27350723
265000
65700000
27831000
35517000
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332000
1000
729391
-68907000
103797000
94483404
42398000
58103000
104441000
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209838000
23000
22879160
-35000
-105385000
7000000
35.00
1802000
25927000
0.001
175411000
120000
2780000
27242503
27242503
189106000
188110000
4000
211000
74541000
115000000
348961000
35595000
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27000
1773000
149691000
7495000
0
422000
149484000
11570000
-207000
74541000
11186000
46568000
6112000
3453000
0.001
5000000
0
19996000
189106000
16543000
161000
6119000
94000
2936000
902000
1022000
169110000
19.76
0
-179671000
1708000
0
2555110
3727000
16000
3183000
648000
1323000
12696000
162180000
149484000
3000000
125516000
4697000
19468000
4999000
4500000
13231000
13231000
13231000
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9363
36000
306000
257460
71000
406000
359000
186000
3000000
125516000
4697000
19468000
13231000
4999000
4500000
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169000
112828000
112660000
10000
19478000
19468000
3000
32000
12885000
12856000
4500000
4500000
1300000
348961000
27000
27242503
-207000
-179671000
0
2008000
26588000
0.001
123430000
1900000
320000
129200000
6027000
27332551
27332551
131621000
130899000
80000
97720000
115000000
14100000
359329000
32352000
97720000
27000
2119000
96922000
2572000
0
347000
96842000
13100000
14297000
-80000
97720000
14991000
59489000
3733000
488000
0.001
5000000
3183000
300000
0
0
9894000
131621000
9894000
110000
82000
3183000
61000
3589000
1038000
3183000
106000
661000
981000
14.18
121727000
14.40
376000
1605537
0
-237549000
1358000
0
1038000
1036000
3080777
14.40
3115003
892000
14000
300000
783000
376000
347000
4497000
101339000
96842000
1500000
69622000
2997000
27220000
22091000
22091000
22091000
7200000
9400000
3400000
3200000
400000
1300000
7200000
9400000
3400000
3200000
400000
1300000
0.50
0.108
0
6401
9000
415000
7200000
9400000
12800000
3400000
12500000
12300000
168221
1889150
219797
2168221
2107295
415000
372000
194000
1500000
69622000
2997000
27220000
22091000
54000
68777000
68723000
24000
27244000
27220000
2000
901000
899000
49100000
35900000
300000
359329000
27000
27332551
-80000
-237549000
0
1300000
0.85
2014-09-01
2014-12-31
P5Y
2019-09-30
0.85
130000000
3942200
500000
1089700
2017-12-31
2976
2020-07-31
P3Y
2017-07-31
2
0.31
148000
46000
1553000
0.006
22586000
-3.00
-0.040
104331000
1553000
0.395
0.019
8141000
16000
0.024
-36513000
-104000
-93000
0.000
0.340
0.006
0
632000
7386000
200000
3569000
-946000
2327000
-35000
3000
35532000
-36478000
-36478000
870000
-57315000
-35000
49000
57200000
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815000
1121000
-36570000
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108142000
28000
-35000
31000
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-28241000
58000
102672000
0.00
100164000
3000
27391000
442000
0.90
2312000
11.73
0.0190
1553000
P6Y3M
92000
12189155
14567000
225000
3569000
0
57000
-104331000
3569000
-1133000
0.032
2008574
900000
0
0
0
0
100000
-100000
1063000
490000
400000
7019000
7019000
1000
442000
204101
1553000
100157000
3000
92000
-104316000
3569000
398
7000
6900000
171750
15077621
-15000
-35000
-36478000
-92000
-94687505
104331000
3600000
62000
8582000
0.010
-22508000
-2.78
-0.039
8582000
0.433
0.039
298000
19195000
100000
70000
0.001
-74458000
-105000
-82000
0.000
0.340
0.009
0
584000
300000
-473000
195987000
3192000
-172000
974000
73813000
-74286000
-74286000
806000
-92118000
-172000
287491000
-72147000
-2139000
4914000
363000
-74286000
-73813000
129164000
438000
-172000
0
1243000
0
-59554000
595000
130044000
0.00
129571000
54618000
800000
0.87
473000
13900000
992505
28.97
0.0175
8582000
P6Y3M
26756079
1381000
32143000
2036000
0
19000
974000
1014000
0.035
2555110
988505
4000
800000
100000
34.46
4769
0
0
-100000
7540
2015-12-31
2015-06-30
2015-01-01
2015-07-01
5652000
2930000
1400000
8582000
0
129567000
974000
0
4000
3942200
2902
418241
-172000
0
-74286000
0
0
100000
43000
Zafgen, Inc.
10-K
0001374690
2005-11-22
<div>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-TOP: 18pt">
<b>6. Notes Payable</b></p>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-TOP: 6pt; TEXT-INDENT: 4%">
The Company has outstanding amounts due under a loan and security
agreement with Oxford Finance LLC and Midcap Financial, or the 2014
Credit Facility, entered into in March 2014. All promissory notes
issued under the 2014 Credit Facility are collateralized by
substantially all of the Company’s personal property, other
than its intellectual property. There are no financial covenants
associated with the 2014 Credit Facility; however, there are
negative covenants restricting the Company’s activities,
including limitations on dispositions, mergers or acquisitions;
encumbering or granting a security interest in its intellectual
property; incurring indebtedness or liens; paying dividends; making
certain investments; and certain other business transactions.</p>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-TOP: 12pt; TEXT-INDENT: 4%">
Upon entering into the 2014 Credit Facility, the Company was
obligated to make monthly, interest-only payments on any term loans
funded under the 2014 Credit Facility until December 1, 2014
and, thereafter, to pay 36 consecutive, equal monthly installments
of principal and interest from January 1, 2015 through
December 1, 2017. As per the terms of the agreement, in June
2014, upon the completion of the Company’s IPO, the term of
monthly, interest-only payments were extended until June 1,
2015. Outstanding term loans under the 2014 Credit Facility bear
interest at an annual rate of 8.1%. In addition, a final payment
equal to 6.0% of any amounts drawn under the 2014 Credit Facility
is due upon the earlier of the maturity date, acceleration of the
term loans or prepayment of all or part of the term loans. The
Company accrues the final payment amount due of $0.5 million,
to outstanding debt by charges to interest expense using the
effective-interest method from the date of issuance through the
maturity date.</p>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-TOP: 12pt; TEXT-INDENT: 4%">
The Company was obligated to pay a separate fee upon any IPO; a
sale of substantially all of the Company’s assets; or a
merger, reorganization or sale of the Company’s voting equity
securities where existing voting stockholders hold less than 50% of
voting equity securities after such transaction.</p>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-TOP: 12pt; TEXT-INDENT: 4%">
The 2014 Credit Facility also includes events of default, the
occurrence and continuation of any of which provides the lenders
the right to exercise remedies against the Company and the
collateral securing the loans under the 2014 Credit Facility,
including cash in the amount of the outstanding balance. These
events of default include, among other things, failure to pay any
amounts due under the 2014 Credit Facility, insolvency, the
occurrence of a material adverse event, the occurrence of any
default under certain other indebtedness and a final judgment
against the Company in an amount greater than
$0.3 million.</p>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-TOP: 12pt; TEXT-INDENT: 4%">
As of December 31, 2016 and 2015, notes payable consist of the
following:</p>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 12pt; MARGIN-TOP: 0pt">
 </p>
<table style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; BORDER-COLLAPSE: collapse" cellspacing="0" cellpadding="0" width="68%" align="center" border="0">
<tr>
<td width="79%"></td>
<td valign="bottom" width="15%"></td>
<td></td>
<td></td>
<td></td>
</tr>
<tr style="FONT-SIZE: 8pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid">
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td valign="bottom" colspan="2" align="center">
<b>December 31,</b></td>
<td valign="bottom"> </td>
</tr>
<tr style="FONT-SIZE: 8pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid">
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td style="BORDER-BOTTOM: #000000 1pt solid" valign="bottom" colspan="2" align="center"><b>2016</b></td>
<td valign="bottom"> </td>
</tr>
<tr style="FONT-SIZE: 8pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid">
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td valign="bottom" colspan="2" align="center">
<b>(in thousands)</b></td>
<td valign="bottom"> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid" bgcolor="#CCEEFF">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-LEFT: 1em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Notes payable</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">3,183</td>
<td valign="bottom" nowrap="nowrap"> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-LEFT: 1em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Debt discount, net of accretion</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">(9</td>
<td valign="bottom" nowrap="nowrap">) </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid" bgcolor="#CCEEFF">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-LEFT: 1em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Accretion related to final payment</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">415</td>
<td valign="bottom" nowrap="nowrap"> </td>
</tr>
<tr style="FONT-SIZE: 1px">
<td valign="bottom"></td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-LEFT: 1em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Notes payable, net of discount, short term</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom">$</td>
<td valign="bottom" align="right">3,589</td>
<td valign="bottom" nowrap="nowrap"> </td>
</tr>
<tr style="FONT-SIZE: 1px">
<td valign="bottom"></td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
</tr>
</table>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 12pt; MARGIN-TOP: 0pt">
 </p>
<table style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; BORDER-COLLAPSE: collapse" cellspacing="0" cellpadding="0" width="68%" align="center" border="0">
<tr>
<td width="79%"></td>
<td valign="bottom" width="15%"></td>
<td></td>
<td></td>
<td></td>
</tr>
<tr style="FONT-SIZE: 8pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid">
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td valign="bottom" colspan="2" align="center">
<b>December 31,</b></td>
<td valign="bottom"> </td>
</tr>
<tr style="FONT-SIZE: 8pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid">
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td style="BORDER-BOTTOM: #000000 1pt solid" valign="bottom" colspan="2" align="center"><b>2015</b></td>
<td valign="bottom"> </td>
</tr>
<tr style="FONT-SIZE: 8pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid">
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td valign="bottom" colspan="2" align="center">
<b>(in thousands)</b></td>
<td valign="bottom"> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid" bgcolor="#CCEEFF">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-LEFT: 1em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Notes payable</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom">$</td>
<td valign="bottom" align="right">6,119</td>
<td valign="bottom" nowrap="nowrap"> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-LEFT: 1em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Less: current portion</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">(2,936</td>
<td valign="bottom" nowrap="nowrap">) </td>
</tr>
<tr style="FONT-SIZE: 1px">
<td valign="bottom"></td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid" bgcolor="#CCEEFF">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-LEFT: 1em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Notes payable, net of current portion</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">3,183</td>
<td valign="bottom" nowrap="nowrap"> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-LEFT: 1em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Debt discount, net of accretion</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">(36</td>
<td valign="bottom" nowrap="nowrap">) </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid" bgcolor="#CCEEFF">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-LEFT: 1em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Accretion related to final payment</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">306</td>
<td valign="bottom" nowrap="nowrap"> </td>
</tr>
<tr style="FONT-SIZE: 1px">
<td valign="bottom"></td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-LEFT: 1em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Notes payable, net of discount, long term</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom">$</td>
<td valign="bottom" align="right">3,453</td>
<td valign="bottom" nowrap="nowrap"> </td>
</tr>
<tr style="FONT-SIZE: 1px">
<td valign="bottom"></td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
</tr>
</table>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-TOP: 12pt; TEXT-INDENT: 4%">
As of December 31, 2016, the estimated future principal
payments due are as follows:</p>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 12pt; MARGIN-TOP: 0pt">
 </p>
<table style="FONT-SIZE: 8pt; FONT-FAMILY: Times New Roman; BORDER-COLLAPSE: collapse" cellspacing="0" cellpadding="0" width="68%" align="center" border="0">
<tr>
<td width="86%"></td>
<td valign="bottom" width="8%"></td>
<td></td>
<td></td>
<td></td>
</tr>
<tr style="FONT-SIZE: 8pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid">
<td valign="bottom" nowrap="nowrap">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 8pt; FONT-FAMILY: Times New Roman; WIDTH: 95.55pt; BORDER-BOTTOM: #000000 1pt solid; MARGIN-TOP: 0pt">
<b>Years Ending December 31,</b></p>
</td>
<td valign="bottom">  </td>
<td valign="bottom" colspan="2"> </td>
<td valign="bottom"> </td>
</tr>
<tr style="FONT-SIZE: 8pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid">
<td valign="bottom"><b>(in thousands)</b></td>
<td valign="bottom">  </td>
<td valign="bottom" colspan="2"> </td>
<td valign="bottom"> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid" bgcolor="#CCEEFF">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-LEFT: 1em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
2017</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom">$</td>
<td valign="bottom" align="right">3,183</td>
<td valign="bottom" nowrap="nowrap"> </td>
</tr>
<tr style="FONT-SIZE: 1px">
<td valign="bottom"></td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-LEFT: 3em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Total</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom">$</td>
<td valign="bottom" align="right">3,183</td>
<td valign="bottom" nowrap="nowrap"> </td>
</tr>
<tr style="FONT-SIZE: 1px">
<td valign="bottom"></td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
</tr>
</table>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-TOP: 12pt; TEXT-INDENT: 4%">
During the years ended December 31, 2016 2015 and 2014, the
Company recognized $0.5 million, $0.8 million and
$0.9 million, respectively, of interest expense related to the
2014 Credit Facility. The effective annual interest rate of the
outstanding debt under the 2014 Credit Facility is approximately
10.8%.</p>
</div>
10113000
2016-12-31
0.000
-3243000
-2.12
-0.039
No
9933000
<div>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; WHITE-SPACE: normal; WORD-SPACING: 0px; TEXT-TRANSFORM: none; FONT-WEIGHT: normal; COLOR: rgb(0,0,0); FONT-STYLE: normal; ORPHANS: 2; WIDOWS: 2; MARGIN-TOP: 12pt; LETTER-SPACING: normal; TEXT-INDENT: 0px; font-variant-ligatures: normal; font-variant-caps: normal; -webkit-text-stroke-width: 0px">
<b>1. Nature of the Business and Basis of Presentation</b></p>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; WHITE-SPACE: normal; WORD-SPACING: 0px; TEXT-TRANSFORM: none; FONT-WEIGHT: normal; COLOR: rgb(0,0,0); FONT-STYLE: normal; ORPHANS: 2; WIDOWS: 2; MARGIN-TOP: 6pt; LETTER-SPACING: normal; TEXT-INDENT: 4%; font-variant-ligatures: normal; font-variant-caps: normal; -webkit-text-stroke-width: 0px">
Zafgen, Inc., or the Company, was incorporated on November 22,
2005 under the laws of the State of Delaware. The Company is a
biopharmaceutical company dedicated to significantly improving the
health and well-being of patients affected by metabolic diseases
including type 2 diabetes and obesity. The Company is focused on
developing novel therapeutics that treat the underlying biological
mechanisms through the methionine aminopeptidase 2
(“MetAP2”) pathway. The Company has pioneered the study
of MetAP2 inhibitors in both common and rare forms of
obesity. The Company’s lead product candidate
is <font style="WHITE-SPACE: nowrap">ZGN-1061,</font> a novel fumagillin-class
MetAP2 inhibitor administered by subcutaneous injection, which is
currently being profiled for its utility in the treatment of
metabolic diseases including type 2 diabetes and
obesity. Since its inception, the Company has devoted
substantially all of its efforts to research and development,
recruiting management, acquiring operating assets and raising
capital.</p>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; WHITE-SPACE: normal; WORD-SPACING: 0px; TEXT-TRANSFORM: none; FONT-WEIGHT: normal; COLOR: rgb(0,0,0); FONT-STYLE: normal; ORPHANS: 2; WIDOWS: 2; MARGIN-TOP: 12pt; LETTER-SPACING: normal; TEXT-INDENT: 4%; font-variant-ligatures: normal; font-variant-caps: normal; -webkit-text-stroke-width: 0px">
On July 19, 2016, the Company announced that it was refocusing
its resources on the development of <font style="WHITE-SPACE: nowrap">ZGN-1061</font> and suspending further
development of beloranib, a first generation MetAP2 inhibitor, that
it had been developing as a treatment for obesity and hyperphagia
in Prader-Willi syndrome (“PWS”) and for hypothalamic
injury-associated obesity (“HIAO”). The beloranib
Investigational New Drug application (“IND”), was
placed on full clinical hold in December 2015 by the U.S. Food and
Drug Administration (“FDA”) as a result of an imbalance
in the number of thrombotic events observed in patients treated
with beloranib as compared to patients on placebo in the
Company’s clinical trials. To address the full clinical hold,
the Company held a Type A meeting with the FDA in June 2016 to
discuss the clinical and <font style="WHITE-SPACE: nowrap">pre-clinical</font> data for beloranib, as well as
a proposed risk mitigation strategy for beloranib in PWS. Following
its discussions with the FDA, a comprehensive review of the
Company’s assets and clinical programs, and review of other
considerations, the Company determined that the obstacles, costs
and development timelines to obtain marketing approval for
beloranib were too great to justify additional investment in the
program, particularly given the promising emerging profile
of <font style="WHITE-SPACE: nowrap">ZGN-1061.</font> In connection with its
corporate refocusing, the Company reduced its workforce by
approximately 31% as of December 2016. In addition, in January
2016, the Company withdrew the IND submitted to the FDA for
ZGN-839, a liver targeted MetAP2 inhibitor for the treatment of
nonalcoholic steatohepatitis, or NASH, and abdominal obesity, in
order to further support the submission package with additional
preclinical and clinical data requested by the FDA, and in October
2016, the Company suspended further development of ZGN-839. The
Company is now focusing all of its personnel and financial
resources on <font style="WHITE-SPACE: nowrap">ZGN-1061</font> and the discovery of novel and
highly-differentiated MetAP2 inhibitors.</p>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; WHITE-SPACE: normal; WORD-SPACING: 0px; TEXT-TRANSFORM: none; FONT-WEIGHT: normal; COLOR: rgb(0,0,0); FONT-STYLE: normal; ORPHANS: 2; WIDOWS: 2; MARGIN-TOP: 12pt; LETTER-SPACING: normal; TEXT-INDENT: 4%; font-variant-ligatures: normal; font-variant-caps: normal; -webkit-text-stroke-width: 0px">
The Company is subject to risks common to companies in the
biotechnology industry including, but not limited to, new
technological innovations, protection of proprietary technology,
dependence on key personnel, compliance with government regulations
and the need to obtain additional financing. Product candidates
currently under development will require significant additional
research and development efforts, including extensive <font style="WHITE-SPACE: nowrap">pre-clinical</font> and clinical testing and
regulatory approval, prior to commercialization. These efforts
require significant amounts of additional capital, adequate
personnel infrastructure, and extensive compliance-reporting
capabilities.</p>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; WHITE-SPACE: normal; WORD-SPACING: 0px; TEXT-TRANSFORM: none; FONT-WEIGHT: normal; COLOR: rgb(0,0,0); FONT-STYLE: normal; ORPHANS: 2; WIDOWS: 2; MARGIN-TOP: 12pt; LETTER-SPACING: normal; TEXT-INDENT: 4%; font-variant-ligatures: normal; font-variant-caps: normal; -webkit-text-stroke-width: 0px">
The Company’s product candidates are all in the development
stage. There can be no assurance that the Company’s research
and development will be successfully completed, that adequate
protection for the Company’s intellectual property will be
obtained, that any product candidates developed will obtain
necessary government regulatory approval or that any approved
products will be commercially viable. Even if the Company’s
product development efforts are successful, it is uncertain when,
if ever, the Company will generate significant revenue from product
sales. The Company operates in an environment of rapid change in
technology and substantial competition from pharmaceutical and
biotechnology companies. In addition, the Company is dependent upon
the services of its employees and consultants.</p>
<p style="MARGIN-BOTTOM: 0px; FONT-SIZE: 1px; FONT-FAMILY: "Times New Roman"; WHITE-SPACE: normal; WORD-SPACING: 0px; TEXT-TRANSFORM: none; FONT-WEIGHT: normal; COLOR: rgb(0,0,0); FONT-STYLE: normal; ORPHANS: 2; WIDOWS: 2; MARGIN-TOP: 12px; LETTER-SPACING: normal; TEXT-INDENT: 0px; font-variant-ligatures: normal; font-variant-caps: normal; -webkit-text-stroke-width: 0px">
 </p>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; WHITE-SPACE: normal; WORD-SPACING: 0px; TEXT-TRANSFORM: none; FONT-WEIGHT: normal; COLOR: rgb(0,0,0); FONT-STYLE: normal; ORPHANS: 2; WIDOWS: 2; MARGIN-TOP: 0pt; LETTER-SPACING: normal; TEXT-INDENT: 4%; font-variant-ligatures: normal; font-variant-caps: normal; -webkit-text-stroke-width: 0px">
The Company has incurred losses and negative cash flows from
operations since its inception. As of December 31, 2016, the
Company had an accumulated deficit of $237.5 million. From its
inception through December 31, 2016, the Company received net
proceeds of $333.3 million from the sales of redeemable
convertible preferred stock, the issuance of convertible promissory
notes, the proceeds from its initial public offering
(“IPO”) in June 2014 and its <font style="WHITE-SPACE: nowrap">follow-on</font> offering in January
2015. Until such time, if ever, as the Company can generate
substantial product revenue, the Company expects to finance its
cash needs through a combination of equity offerings, debt
financings, collaborations, strategic alliances, licensing
arrangements and other sources of funding. If the Company is
unable to raise additional funds through equity or debt financings
when needed, the Company may be required to delay, limit, reduce or
terminate product development or future commercialization efforts
or grant rights to develop and market products or product
candidates that the Company would otherwise prefer to develop and
market itself. Based on its current operating plans, the Company
believes its cash, cash equivalents and marketable securities of
$129.2 million as of December 31, 2016 will be sufficient
to fund its anticipated level of operations and capital
expenditures for a period of at least one year from the issuance
date of this Annual Report.</p>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; WHITE-SPACE: normal; WORD-SPACING: 0px; TEXT-TRANSFORM: none; FONT-WEIGHT: normal; COLOR: rgb(0,0,0); FONT-STYLE: normal; ORPHANS: 2; WIDOWS: 2; MARGIN-TOP: 12pt; LETTER-SPACING: normal; TEXT-INDENT: 4%; font-variant-ligatures: normal; font-variant-caps: normal; -webkit-text-stroke-width: 0px">
The consolidated financial statements include the accounts of the
Company and its wholly owned subsidiaries Zafgen Securities
Corporation, Zafgen Australia Pty Limited, and Zafgen Animal
Health, LLC. All intercompany balances and transactions have been
eliminated.</p>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; WHITE-SPACE: normal; WORD-SPACING: 0px; TEXT-TRANSFORM: none; FONT-WEIGHT: normal; COLOR: rgb(0,0,0); FONT-STYLE: normal; ORPHANS: 2; WIDOWS: 2; MARGIN-TOP: 12pt; LETTER-SPACING: normal; TEXT-INDENT: 4%; font-variant-ligatures: normal; font-variant-caps: normal; -webkit-text-stroke-width: 0px">
The accompanying consolidated financial statements have been
prepared in conformity with accounting principles generally
accepted in the United States of America (“GAAP”).</p>
</div>
0.401
0.029
<div>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-TOP: 6pt; TEXT-INDENT: 4%">
The following tables summarize the Company’s marketable
securities as of December 31, 2016 and 2015:</p>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 12pt; MARGIN-TOP: 0pt">
 </p>
<table style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; BORDER-COLLAPSE: collapse" cellspacing="0" cellpadding="0" width="92%" align="center" border="0">
<tr>
<td width="58%"></td>
<td valign="bottom" width="6%"></td>
<td></td>
<td></td>
<td></td>
<td valign="bottom" width="6%"></td>
<td></td>
<td></td>
<td></td>
<td valign="bottom" width="6%"></td>
<td></td>
<td></td>
<td></td>
<td valign="bottom" width="6%"></td>
<td></td>
<td></td>
<td></td>
</tr>
<tr style="FONT-SIZE: 8pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid">
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td style="BORDER-BOTTOM: #000000 1pt solid" valign="bottom" colspan="14" align="center"><b>December 31, 2016</b></td>
<td valign="bottom"> </td>
</tr>
<tr style="FONT-SIZE: 8pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid">
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td style="BORDER-BOTTOM: #000000 1pt solid" valign="bottom" colspan="2" align="center"><b>Amortized<br />
Cost</b></td>
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td style="BORDER-BOTTOM: #000000 1pt solid" valign="bottom" colspan="2" align="center"><b>Gross<br />
Unrealized<br />
Gains</b></td>
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td style="BORDER-BOTTOM: #000000 1pt solid" valign="bottom" colspan="2" align="center"><b>Gross<br />
Unrealized<br />
Losses</b></td>
<td valign="bottom"> </td>
<td valign="bottom"> </td>
<td style="BORDER-BOTTOM: #000000 1pt solid" valign="bottom" colspan="2" align="center"><b>Fair Value</b></td>
<td valign="bottom"> </td>
</tr>
<tr style="FONT-SIZE: 8pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid">
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td valign="bottom" colspan="14" align="center"><b>(in
thousands)</b></td>
<td valign="bottom"> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid" bgcolor="#CCEEFF">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-LEFT: 1em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
<b>Assets:</b></p>
</td>
<td valign="bottom">  </td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom">  </td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom">  </td>
<td valign="bottom"></td>
<td valign="bottom" colspan="5"></td>
<td valign="bottom"></td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-LEFT: 3em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Corporate bonds (due within 1 year)</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom">$</td>
<td valign="bottom" align="right">68,777</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom" nowrap="nowrap">$</td>
<td valign="bottom" nowrap="nowrap" align="right">
—  </td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom">$</td>
<td valign="bottom" align="right">(54</td>
<td valign="bottom" nowrap="nowrap">) </td>
<td valign="bottom"> </td>
<td valign="bottom">$</td>
<td valign="bottom" align="right">68,723</td>
<td valign="bottom" nowrap="nowrap"> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid" bgcolor="#CCEEFF">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-LEFT: 3em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Corporate bonds (due after 1 year through 2 years)</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">901</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom" nowrap="nowrap" align="right">
—  </td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">(2</td>
<td valign="bottom" nowrap="nowrap">) </td>
<td valign="bottom"> </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">899</td>
<td valign="bottom" nowrap="nowrap"> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-LEFT: 3em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Commercial paper (due within 1 year)</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">27,244</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom" nowrap="nowrap" align="right">
—  </td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">(24</td>
<td valign="bottom" nowrap="nowrap">) </td>
<td valign="bottom"> </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">27,220</td>
<td valign="bottom" nowrap="nowrap"> </td>
</tr>
<tr style="FONT-SIZE: 1px">
<td valign="bottom"></td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
<td valign="bottom"> </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid" bgcolor="#CCEEFF">
<td valign="top"></td>
<td valign="bottom">  </td>
<td valign="bottom">$</td>
<td valign="bottom" align="right">96,922</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom" nowrap="nowrap">$</td>
<td valign="bottom" nowrap="nowrap" align="right">
—  </td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom">$</td>
<td valign="bottom" align="right">(80</td>
<td valign="bottom" nowrap="nowrap">) </td>
<td valign="bottom"> </td>
<td valign="bottom">$</td>
<td valign="bottom" align="right">96,842</td>
<td valign="bottom" nowrap="nowrap"> </td>
</tr>
<tr style="FONT-SIZE: 1px">
<td valign="bottom"></td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
<td valign="bottom"> </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
</tr>
</table>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 12pt; MARGIN-TOP: 0pt">
 </p>
<table style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; BORDER-COLLAPSE: collapse" cellspacing="0" cellpadding="0" width="92%" align="center" border="0">
<tr>
<td width="61%"></td>
<td valign="bottom" width="5%"></td>
<td></td>
<td></td>
<td></td>
<td valign="bottom" width="5%"></td>
<td></td>
<td></td>
<td></td>
<td valign="bottom" width="5%"></td>
<td></td>
<td></td>
<td></td>
<td valign="bottom" width="5%"></td>
<td></td>
<td></td>
<td></td>
</tr>
<tr style="FONT-SIZE: 8pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid">
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td style="BORDER-BOTTOM: #000000 1pt solid" valign="bottom" colspan="14" align="center"><b>December 31, 2015</b></td>
<td valign="bottom"> </td>
</tr>
<tr style="FONT-SIZE: 8pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid">
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td style="BORDER-BOTTOM: #000000 1pt solid" valign="bottom" colspan="2" align="center"><b>Amortized<br />
Cost</b></td>
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td style="BORDER-BOTTOM: #000000 1pt solid" valign="bottom" colspan="2" align="center"><b>Gross<br />
Unrealized<br />
Gains</b></td>
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td style="BORDER-BOTTOM: #000000 1pt solid" valign="bottom" colspan="2" align="center"><b>Gross<br />
Unrealized<br />
Losses</b></td>
<td valign="bottom"> </td>
<td valign="bottom"> </td>
<td style="BORDER-BOTTOM: #000000 1pt solid" valign="bottom" colspan="2" align="center"><b>Fair Value</b></td>
<td valign="bottom"> </td>
</tr>
<tr style="FONT-SIZE: 8pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid">
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td valign="bottom" colspan="14" align="center"><b>(in
thousands)</b></td>
<td valign="bottom"> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid" bgcolor="#CCEEFF">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-LEFT: 1em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
<b>Assets:</b></p>
</td>
<td valign="bottom">  </td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom">  </td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom">  </td>
<td valign="bottom"></td>
<td valign="bottom" colspan="5"></td>
<td valign="bottom"></td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-LEFT: 3em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Corporate bonds (due within 1 year)</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom">$</td>
<td valign="bottom" align="right">112,828</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom">$</td>
<td valign="bottom" align="right">1</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom">$</td>
<td valign="bottom" align="right">(169</td>
<td valign="bottom" nowrap="nowrap">) </td>
<td valign="bottom"> </td>
<td valign="bottom">$</td>
<td valign="bottom" align="right">112,660</td>
<td valign="bottom" nowrap="nowrap"> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid" bgcolor="#CCEEFF">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-LEFT: 3em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Corporate bonds (due after 1 year through 2 years)</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">12,885</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">3</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">(32</td>
<td valign="bottom" nowrap="nowrap">) </td>
<td valign="bottom"> </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">12,856</td>
<td valign="bottom" nowrap="nowrap"> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-LEFT: 3em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Commercial paper (due within 1 year)</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">19,478</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom" nowrap="nowrap" align="right">
—  </td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">(10</td>
<td valign="bottom" nowrap="nowrap">) </td>
<td valign="bottom"> </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">19,468</td>
<td valign="bottom" nowrap="nowrap"> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid" bgcolor="#CCEEFF">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-LEFT: 3em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
U.S. government securities (due within 1 year)</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">4,500</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom" nowrap="nowrap" align="right">
—  </td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom" nowrap="nowrap" align="right">
—  </td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom"> </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">4,500</td>
<td valign="bottom" nowrap="nowrap"> </td>
</tr>
<tr style="FONT-SIZE: 1px">
<td valign="bottom"></td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
<td valign="bottom"> </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid">
<td valign="top"></td>
<td valign="bottom">  </td>
<td valign="bottom">$</td>
<td valign="bottom" align="right">149,691</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom">$</td>
<td valign="bottom" align="right">4</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom">$</td>
<td valign="bottom" align="right">(211</td>
<td valign="bottom" nowrap="nowrap">) </td>
<td valign="bottom"> </td>
<td valign="bottom">$</td>
<td valign="bottom" align="right">149,484</td>
<td valign="bottom" nowrap="nowrap"> </td>
</tr>
<tr style="FONT-SIZE: 1px">
<td valign="bottom"></td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
<td valign="bottom"> </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
</tr>
</table>
</div>
2016
false
--12-31
Yes
18289000
<div>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-TOP: 18pt">
<b>Concentration of Credit Risk and of Significant
Suppliers</b></p>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-TOP: 6pt; TEXT-INDENT: 4%">
Financial instruments that potentially expose the Company to
concentrations of credit risk consist primarily of cash, cash
equivalents and marketable securities. The Company has all cash,
cash equivalents and marketable securities balances at two
accredited financial institutions in amounts that exceed federally
insured limits. The Company does not believe that it is subject to
unusual credit risk beyond the normal credit risk associated with
commercial banking relationships.</p>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-TOP: 12pt; TEXT-INDENT: 4%">
The Company is dependent on third-party manufacturers to supply
products for research and development activities in its programs.
In particular, the Company relies and expects to continue to rely
on a small number of manufacturers to supply it with its
requirements for the active pharmaceutical ingredients and
formulated drugs related to these programs. These programs could be
adversely affected by a significant interruption in the supply of
active pharmaceutical ingredients and formulated drugs.</p>
</div>
200000
0.02
<div>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-TOP: 12pt; TEXT-INDENT: 4%">
The following tables summarize the Company’s cash equivalents
and marketable securities as of December 31, 2016 and
2015:</p>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 12pt; MARGIN-TOP: 0pt">
 </p>
<table style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; BORDER-COLLAPSE: collapse" cellspacing="0" cellpadding="0" width="92%" align="center" border="0">
<tr>
<td width="53%"></td>
<td valign="bottom" width="6%"></td>
<td></td>
<td></td>
<td></td>
<td valign="bottom" width="6%"></td>
<td></td>
<td></td>
<td></td>
<td valign="bottom" width="6%"></td>
<td></td>
<td></td>
<td></td>
<td valign="bottom" width="6%"></td>
<td></td>
<td></td>
<td></td>
</tr>
<tr style="FONT-SIZE: 8pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid">
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td style="BORDER-BOTTOM: #000000 1pt solid" valign="bottom" colspan="14" align="center"><b>December 31, 2016</b></td>
<td valign="bottom"> </td>
</tr>
<tr style="FONT-SIZE: 8pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid">
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td style="BORDER-BOTTOM: #000000 1pt solid" valign="bottom" colspan="2" align="center"><b>Total</b></td>
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td style="BORDER-BOTTOM: #000000 1pt solid" valign="bottom" colspan="2" align="center"><b>Quoted<br />
Prices in<br />
Active<br />
Markets<br />
(Level 1)</b></td>
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td style="BORDER-BOTTOM: #000000 1pt solid" valign="bottom" colspan="2" align="center"><b>Significant<br />
Other<br />
Observable<br />
Inputs<br />
(Level 2)</b></td>
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td style="BORDER-BOTTOM: #000000 1pt solid" valign="bottom" colspan="2" align="center"><b>Significant<br />
Unobservable<br />
Inputs<br />
(Level 3)</b></td>
<td valign="bottom"> </td>
</tr>
<tr style="FONT-SIZE: 8pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid">
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td valign="bottom" colspan="14" align="center"><b>(in
thousands)</b></td>
<td valign="bottom"> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid" bgcolor="#CCEEFF">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-LEFT: 1em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
<b>Cash equivalents:</b></p>
</td>
<td valign="bottom">  </td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom">  </td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom">  </td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom">  </td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom"></td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-LEFT: 3em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Money market funds</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom">$</td>
<td valign="bottom" align="right">22,091</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom">$</td>
<td valign="bottom" align="right">22,091</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom" nowrap="nowrap">$</td>
<td valign="bottom" nowrap="nowrap" align="right">
—  </td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom" nowrap="nowrap">$</td>
<td valign="bottom" nowrap="nowrap" align="right">
—  </td>
<td valign="bottom" nowrap="nowrap"> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid" bgcolor="#CCEEFF">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-LEFT: 3em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Commercial paper</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">2,997</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom" nowrap="nowrap" align="right">
—  </td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">2,997</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom" nowrap="nowrap" align="right">
—  </td>
<td valign="bottom" nowrap="nowrap"> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-LEFT: 3em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Corporate bonds</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">1,500</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom" nowrap="nowrap" align="right">
—  </td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">1,500</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom" nowrap="nowrap" align="right">
—  </td>
<td valign="bottom" nowrap="nowrap"> </td>
</tr>
<tr style="FONT-SIZE: 1px">
<td valign="bottom"></td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid" bgcolor="#CCEEFF">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-LEFT: 5em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Total cash equivalents</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">26,588</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">22,091</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">4,497</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom" nowrap="nowrap" align="right">
—  </td>
<td valign="bottom" nowrap="nowrap"> </td>
</tr>
<tr style="FONT-SIZE: 1px">
<td valign="bottom"></td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-LEFT: 1em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
<b>Marketable securities:</b></p>
</td>
<td valign="bottom">  </td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom">  </td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom">  </td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom">  </td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom"></td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid" bgcolor="#CCEEFF">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-LEFT: 3em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Corporate bonds</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">69,622</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom" nowrap="nowrap" align="right">
—  </td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">69,622</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom" nowrap="nowrap" align="right">
—  </td>
<td valign="bottom" nowrap="nowrap"> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-LEFT: 3em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Commercial paper</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">27,220</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom" nowrap="nowrap" align="right">
—  </td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">27,220</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom" nowrap="nowrap" align="right">
—  </td>
<td valign="bottom" nowrap="nowrap"> </td>
</tr>
<tr style="FONT-SIZE: 1px">
<td valign="bottom"></td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid" bgcolor="#CCEEFF">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-LEFT: 5em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Total marketable securities</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">96,842</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom" nowrap="nowrap" align="right">
—  </td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">96,842</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom" nowrap="nowrap" align="right">
—  </td>
<td valign="bottom" nowrap="nowrap"> </td>
</tr>
<tr style="FONT-SIZE: 1px">
<td valign="bottom"></td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-LEFT: 1em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Total cash equivalents and marketable securities</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom">$</td>
<td valign="bottom" align="right">123,430</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom">$</td>
<td valign="bottom" align="right">22,091</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom">$</td>
<td valign="bottom" align="right">101,339</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom" nowrap="nowrap">$</td>
<td valign="bottom" nowrap="nowrap" align="right">
—  </td>
<td valign="bottom" nowrap="nowrap"> </td>
</tr>
<tr style="FONT-SIZE: 1px">
<td valign="bottom"></td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
</tr>
</table>
<p style="MARGIN-BOTTOM: 0px; FONT-SIZE: 1px; MARGIN-TOP: 12px">
 </p>
<table style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; BORDER-COLLAPSE: collapse" cellspacing="0" cellpadding="0" width="92%" align="center" border="0">
<tr>
<td width="53%"></td>
<td valign="bottom" width="6%"></td>
<td></td>
<td></td>
<td></td>
<td valign="bottom" width="6%"></td>
<td></td>
<td></td>
<td></td>
<td valign="bottom" width="6%"></td>
<td></td>
<td></td>
<td></td>
<td valign="bottom" width="6%"></td>
<td></td>
<td></td>
<td></td>
</tr>
<tr style="FONT-SIZE: 8pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid">
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td style="BORDER-BOTTOM: #000000 1pt solid" valign="bottom" colspan="14" align="center"><b>December 31, 2015</b></td>
<td valign="bottom"> </td>
</tr>
<tr style="FONT-SIZE: 8pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid">
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td style="BORDER-BOTTOM: #000000 1pt solid" valign="bottom" colspan="2" align="center"><b>Total</b></td>
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td style="BORDER-BOTTOM: #000000 1pt solid" valign="bottom" colspan="2" align="center"><b>Quoted<br />
Prices in<br />
Active<br />
Markets<br />
(Level 1)</b></td>
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td style="BORDER-BOTTOM: #000000 1pt solid" valign="bottom" colspan="2" align="center"><b>Significant<br />
Other<br />
Observable<br />
Inputs<br />
(Level 2)</b></td>
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td style="BORDER-BOTTOM: #000000 1pt solid" valign="bottom" colspan="2" align="center"><b>Significant<br />
Unobservable<br />
Inputs<br />
(Level 3)</b></td>
<td valign="bottom"> </td>
</tr>
<tr style="FONT-SIZE: 8pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid">
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td valign="bottom" colspan="14" align="center"><b>(in
thousands)</b></td>
<td valign="bottom"> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid" bgcolor="#CCEEFF">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-LEFT: 1em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
<b>Cash equivalents:</b></p>
</td>
<td valign="bottom">  </td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom">  </td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom">  </td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom">  </td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom"></td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-LEFT: 3em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Money market funds</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom">$</td>
<td valign="bottom" align="right">13,231</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom">$</td>
<td valign="bottom" align="right">13,231</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom" nowrap="nowrap">$</td>
<td valign="bottom" nowrap="nowrap" align="right">
—  </td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom" nowrap="nowrap">$</td>
<td valign="bottom" nowrap="nowrap" align="right">
—  </td>
<td valign="bottom" nowrap="nowrap"> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid" bgcolor="#CCEEFF">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-LEFT: 3em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
U.S. government securities</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">4,999</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom" nowrap="nowrap" align="right">
—  </td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">4,999</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom" nowrap="nowrap" align="right">
—  </td>
<td valign="bottom" nowrap="nowrap"> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-LEFT: 3em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Commercial paper</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">4,697</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom" nowrap="nowrap" align="right">
—  </td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">4,697</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom" nowrap="nowrap" align="right">
—  </td>
<td valign="bottom" nowrap="nowrap"> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid" bgcolor="#CCEEFF">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-LEFT: 3em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Corporate bonds</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">3,000</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom" nowrap="nowrap" align="right">
—  </td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">3,000</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom" nowrap="nowrap" align="right">
—  </td>
<td valign="bottom" nowrap="nowrap"> </td>
</tr>
<tr style="FONT-SIZE: 1px">
<td valign="bottom"></td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-LEFT: 5em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Total cash equivalents</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">25,927</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">13,231</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">12,696</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom" nowrap="nowrap" align="right">
—  </td>
<td valign="bottom" nowrap="nowrap"> </td>
</tr>
<tr style="FONT-SIZE: 1px">
<td valign="bottom"></td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid" bgcolor="#CCEEFF">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-LEFT: 1em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
<b>Marketable securities:</b></p>
</td>
<td valign="bottom">  </td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom">  </td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom">  </td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom">  </td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom"></td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-LEFT: 3em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Corporate bonds</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">125,516</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom" nowrap="nowrap" align="right">
—  </td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">125,516</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom" nowrap="nowrap" align="right">
—  </td>
<td valign="bottom" nowrap="nowrap"> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid" bgcolor="#CCEEFF">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-LEFT: 3em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Commercial paper</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">19,468</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom" nowrap="nowrap" align="right">
—  </td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">19,468</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom" nowrap="nowrap" align="right">
—  </td>
<td valign="bottom" nowrap="nowrap"> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-LEFT: 3em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
U.S. government securities</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">4,500</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom" nowrap="nowrap" align="right">
—  </td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">4,500</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom" nowrap="nowrap" align="right">
—  </td>
<td valign="bottom" nowrap="nowrap"> </td>
</tr>
<tr style="FONT-SIZE: 1px">
<td valign="bottom"></td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid" bgcolor="#CCEEFF">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-LEFT: 5em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Total marketable securities</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">149,484</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom" nowrap="nowrap" align="right">
—  </td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">149,484</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom" nowrap="nowrap" align="right">
—  </td>
<td valign="bottom" nowrap="nowrap"> </td>
</tr>
<tr style="FONT-SIZE: 1px">
<td valign="bottom"></td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-LEFT: 1em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Total cash equivalents and marketable securities</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom">$</td>
<td valign="bottom" align="right">175,411</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom">$</td>
<td valign="bottom" align="right">13,231</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom">$</td>
<td valign="bottom" align="right">162,180</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom" nowrap="nowrap">$</td>
<td valign="bottom" nowrap="nowrap" align="right">
—  </td>
<td valign="bottom" nowrap="nowrap"> </td>
</tr>
<tr style="FONT-SIZE: 1px">
<td valign="bottom"></td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
</tr>
</table>
</div>
<div>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-TOP: 18pt">
<b>Cash Equivalents</b></p>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-TOP: 6pt; TEXT-INDENT: 4%">
The Company considers all short-term, highly liquid investments
with original maturities of ninety days or less at acquisition date
to be cash equivalents. Cash equivalents, which consist of money
market funds, U.S. government securities, corporate bonds, and
commercial paper, are stated at fair value.</p>
</div>
212000
<div>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-TOP: 18pt">
<b>8. Stock-Based Awards</b></p>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-TOP: 6pt">
<b>Stock Option Plans</b></p>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-TOP: 6pt; TEXT-INDENT: 4%">
The Company’s Amended and Restated 2006 Stock Option Plan
(the “2006 Plan”) provided for the Company to sell or
issue common stock or restricted common stock, or to grant
incentive stock options or nonqualified stock options for the
purchase of common stock, to employees, members of the board of
directors and consultants of the Company. The 2006 Plan was
administered by the board of directors, or at the discretion of the
board of directors, by a committee of the board. The exercise
prices, vesting and other restrictions were determined at the
discretion of the board of directors, or a committee of the board
of directors if so delegated, except that the exercise price per
share of stock options could not be less than 100% of the fair
market value of the share of common stock on the date of grant and
the term of stock option could not be greater than ten years. The
total number of shares of common stock that could have been issued
under the 2006 Plan was 1,889,150 shares. Upon closing of the
Company’s IPO, 168,221 shares reserved and not then subject
to outstanding options were transferred to the 2014 Stock Option
and Incentive Plan, and no further awards will be made under the
2006 Plan.</p>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-TOP: 12pt; TEXT-INDENT: 4%">
On June 5, 2014, the Company’s stockholders approved the
2014 Stock Option and Incentive Plan (the “2014 Stock Option
Plan”), which became effective upon the completion of the IPO
of the Company’s shares of common stock in June 2014. The
2014 Stock Option Plan provides for the grant of stock options,
stock appreciation rights, restricted stock awards, restricted
stock units, unrestricted stock awards, performance-share awards,
cash-based awards and dividend equivalent rights. The number of
shares initially reserved for issuance under the 2014 Stock Option
Plan is 2,168,221 shares of common stock and may be increased by
the number of shares under the 2006 Plan that are not needed to
fulfill the Company’s obligations for awards issued under the
2006 Plan as a result of forfeiture, expiration, cancellation,
termination or net issuances of awards thereunder. The number of
shares of common stock that may be issued under the 2014 Stock
Option Plan is also subject to increase on the first day of each
fiscal year by the lesser of (i) 4% of the Company’s
outstanding shares of common stock as of that date, or (ii) an
amount determined by the board of directors. As of
December 31, 2016, 2,107,295 shares are available for grant
under the 2014 Stock Option Plan, including 1,089,700 shares
automatically added to the 2014 Stock Option Plan on
January 1, 2016 as a result of a provision in the 2014 Stock
Option Plan.</p>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-TOP: 12pt; TEXT-INDENT: 4%">
The Company generally grants stock-based awards with service
conditions only (“service-based” awards).</p>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-TOP: 12pt; TEXT-INDENT: 4%">
As required by the 2006 Plan and 2014 Stock Option Plan, the
exercise price for stock options granted is not to be less than the
fair value of common shares as of the date of grant. Prior to the
IPO, the value of common stock was determined by the board of
directors by taking into consideration its most recently available
valuation of common shares performed by management and the board of
directors as well as additional factors which might have changed
since the date of the most recent contemporaneous valuation through
the date of grant.</p>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-TOP: 12pt; TEXT-INDENT: 4%">
During the year ended December 31, 2016, the Company granted
stock options for the purchase of 1,527,559 shares of common stock,
of which options for the purchase of 1,519,559 shares were granted
to employees and directors and options for the purchase of 8,000
shares were granted to a consultant.</p>
<p style="MARGIN-BOTTOM: 0px; FONT-SIZE: 1px; MARGIN-TOP: 12px">
 </p>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-TOP: 0pt; TEXT-INDENT: 4%">
During the year ended December 31, 2015, the Company granted
stock options for the purchase of 992,505 shares of common stock,
of which options for the purchase of 988,505 shares were granted to
employees and directors and options for the purchase of 4,000
shares were granted to a consultant.</p>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-TOP: 18pt">
<b>2014 Employee Stock Purchase Plan</b></p>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-TOP: 6pt; TEXT-INDENT: 4%">
On June 5, 2014, the Company’s stockholders approved the
2014 Employee Stock Purchase Plan (the “ESPP”). A total
of 265,000 shares of common stock were reserved for issuance under
this plan. The ESPP became effective upon the completion of the IPO
of the Company’s shares of common stock. The first offering
period commenced on September 1, 2014 and ended on
December 31, 2014. During both 2016 and 2015 there were two
offering periods, January 1 through June 30 and
July 1 through December 31. The per share purchase price
for offerings is equal to the lesser of 85% of the closing market
price of the Company’s common stock on the first day or last
day of the offering period. The Company issued 37,663 and 7,540
shares during the years ended December 31, 2016 and 2015,
respectively. As of December 31, 2016 and 2015, there are
219,797 and 257,460 shares, respectively, of common stock available
for issuance to participating employees under the ESPP.</p>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-TOP: 18pt">
<b>Stock Option Valuation</b></p>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-TOP: 6pt; TEXT-INDENT: 4%">
The fair value of each stock option grant is estimated on the date
of grant using the Black-Scholes option-pricing model. Prior to its
IPO in June 2014, the Company was a private company and lacks
company-specific historical and implied volatility information.
Therefore, the Company estimates its expected stock volatility
based on the historical volatility of a publicly traded set of peer
companies and expects to continue to do so until such time as it
has adequate historical data regarding the volatility of its own
traded stock price. The expected term of the Company’s stock
options has been determined utilizing the “simplified”
method for awards that qualify as “plain-vanilla”
options. The expected term of stock options granted to nonemployees
is equal to the contractual term of the option award. The risk-free
interest rate is determined by reference to the U.S. Treasury yield
curve in effect at the time of grant of the award for time periods
approximately equal to the expected term of the award. Expected
dividend yield is based on the fact that the Company has never paid
cash dividends and does not expect to pay any cash dividends in the
foreseeable future. The assumptions that the Company used to
determine the fair value of the stock options granted to employees
and directors are as follows, presented on a weighted average
basis:</p>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 12pt; MARGIN-TOP: 0pt">
 </p>
<table style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; BORDER-COLLAPSE: collapse" cellspacing="0" cellpadding="0" width="76%" align="center" border="0">
<tr>
<td width="75%"></td>
<td valign="bottom" width="6%"></td>
<td></td>
<td></td>
<td></td>
<td valign="bottom" width="5%"></td>
<td></td>
<td></td>
<td></td>
<td valign="bottom" width="5%"></td>
<td></td>
<td></td>
<td></td>
</tr>
<tr style="FONT-SIZE: 8pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid">
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td style="BORDER-BOTTOM: rgb(0,0,0) 1pt solid" valign="bottom" colspan="2" align="center"><b>2016</b></td>
<td valign="bottom"> </td>
<td valign="bottom"> </td>
<td style="BORDER-BOTTOM: rgb(0,0,0) 1pt solid" valign="bottom" colspan="2" align="center"><b>2015</b></td>
<td valign="bottom"> </td>
<td valign="bottom"> </td>
<td style="BORDER-BOTTOM: rgb(0,0,0) 1pt solid" valign="bottom" colspan="2" align="center"><b>2014</b></td>
<td valign="bottom"> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid" bgcolor="#CCEEFF">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-LEFT: 1em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Risk-free interest rate</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">1.40</td>
<td valign="bottom" nowrap="nowrap">% </td>
<td valign="bottom"> </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">1.75</td>
<td valign="bottom" nowrap="nowrap">% </td>
<td valign="bottom"> </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">1.90</td>
<td valign="bottom" nowrap="nowrap">% </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-LEFT: 1em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Expected term (in years)</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">6.18</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom"> </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">6.25</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom"> </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">6.25</td>
<td valign="bottom" nowrap="nowrap"> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid" bgcolor="#CCEEFF">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-LEFT: 1em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Expected volatility</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">87</td>
<td valign="bottom" nowrap="nowrap">% </td>
<td valign="bottom"> </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">87</td>
<td valign="bottom" nowrap="nowrap">% </td>
<td valign="bottom"> </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">90</td>
<td valign="bottom" nowrap="nowrap">% </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-LEFT: 1em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Expected dividend yield</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">0</td>
<td valign="bottom" nowrap="nowrap">% </td>
<td valign="bottom"> </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">0</td>
<td valign="bottom" nowrap="nowrap">% </td>
<td valign="bottom"> </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">0</td>
<td valign="bottom" nowrap="nowrap">% </td>
</tr>
</table>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-TOP: 12pt; TEXT-INDENT: 4%">
The following table summarizes the Company’s stock option
activity since December 31, 2015:</p>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 12pt; MARGIN-TOP: 0pt">
 </p>
<table style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; BORDER-COLLAPSE: collapse" cellspacing="0" cellpadding="0" width="100%" align="center" border="0">
<tr>
<td width="57%"></td>
<td valign="bottom" width="6%"></td>
<td></td>
<td></td>
<td></td>
<td valign="bottom" width="6%"></td>
<td></td>
<td></td>
<td></td>
<td valign="bottom" width="6%"></td>
<td></td>
<td></td>
<td></td>
<td valign="bottom" width="6%"></td>
<td></td>
<td></td>
<td></td>
</tr>
<tr style="FONT-SIZE: 8pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid">
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td style="BORDER-BOTTOM: rgb(0,0,0) 1pt solid" valign="bottom" colspan="2" align="center"><b>Shares Issuable<br />
Under Options</b></td>
<td valign="bottom"> </td>
<td valign="bottom"> </td>
<td style="BORDER-BOTTOM: rgb(0,0,0) 1pt solid" valign="bottom" colspan="2" align="center"><b>Weighted<br />
Average<br />
Exercise<br />
Price</b></td>
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td style="BORDER-BOTTOM: rgb(0,0,0) 1pt solid" valign="bottom" colspan="2" align="center"><b>Average<br />
Remaining<br />
Contractual<br />
Term</b></td>
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td style="BORDER-BOTTOM: rgb(0,0,0) 1pt solid" valign="bottom" colspan="2" align="center"><b>Aggregate<br />
Intrinsic<br />
Value</b></td>
<td valign="bottom"> </td>
</tr>
<tr style="FONT-SIZE: 8pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid">
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td valign="bottom" colspan="2"> </td>
<td valign="bottom"> </td>
<td valign="bottom"> </td>
<td valign="bottom" colspan="2"> </td>
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td valign="bottom" colspan="2" align="center"><b>(in
years)</b></td>
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td valign="bottom" colspan="2" align="center">
<b>(in thousands)</b></td>
<td valign="bottom"> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid" bgcolor="#CCEEFF">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-LEFT: 1em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
<b>Outstanding as of December 31, 2015</b></p>
</td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">2,555,110</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom"> </td>
<td valign="bottom">$</td>
<td valign="bottom" align="right">19.76</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom">  </td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom"></td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-LEFT: 3em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Granted</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">1,527,559</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom"> </td>
<td valign="bottom">$</td>
<td valign="bottom" align="right">6.65</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom">  </td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom"></td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid" bgcolor="#CCEEFF">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-LEFT: 3em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Exercised</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">(35,000</td>
<td valign="bottom" nowrap="nowrap">) </td>
<td valign="bottom"> </td>
<td valign="bottom">$</td>
<td valign="bottom" align="right">0.75</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom">  </td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom"></td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-LEFT: 3em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Forfeited</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">(932,666</td>
<td valign="bottom" nowrap="nowrap">) </td>
<td valign="bottom"> </td>
<td valign="bottom">$</td>
<td valign="bottom" align="right">16.90</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom">  </td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom"></td>
</tr>
<tr style="FONT-SIZE: 1px">
<td valign="bottom"></td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
<td valign="bottom"> </td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom">  </td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom">  </td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom"></td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid" bgcolor="#CCEEFF">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-LEFT: 1em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
<b>Outstanding as of December 31, 2016</b></p>
</td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">3,115,003</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom"> </td>
<td valign="bottom">$</td>
<td valign="bottom" align="right">14.40</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">7.2</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom">$</td>
<td valign="bottom" align="right">1,038</td>
<td valign="bottom" nowrap="nowrap"> </td>
</tr>
<tr style="FONT-SIZE: 1px">
<td valign="bottom"></td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
<td valign="bottom"> </td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom">  </td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom">  </td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom"></td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-LEFT: 1em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
<b>Options vested and expected to vest as of December 31,
2016</b></p>
</td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">3,080,777</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom"> </td>
<td valign="bottom">$</td>
<td valign="bottom" align="right">14.40</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">7.2</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom">$</td>
<td valign="bottom" align="right">1,038</td>
<td valign="bottom" nowrap="nowrap"> </td>
</tr>
<tr style="FONT-SIZE: 1px">
<td valign="bottom"></td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
<td valign="bottom"> </td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom">  </td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom">  </td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom"></td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid" bgcolor="#CCEEFF">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-LEFT: 1em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
<b>Options exercisable as of December 31, 2016</b></p>
</td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">1,605,537</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom"> </td>
<td valign="bottom">$</td>
<td valign="bottom" align="right">14.18</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">5.5</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom">$</td>
<td valign="bottom" align="right">1,036</td>
<td valign="bottom" nowrap="nowrap"> </td>
</tr>
<tr style="FONT-SIZE: 1px">
<td valign="bottom"></td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
<td valign="bottom"> </td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom">  </td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom">  </td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom"></td>
</tr>
</table>
<p style="MARGIN-BOTTOM: 0px; FONT-SIZE: 1px; MARGIN-TOP: 12px">
 </p>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-TOP: 0pt; TEXT-INDENT: 4%">
The aggregate intrinsic value of stock options is calculated as the
difference between the exercise price of the stock options and the
fair value of the Company’s common stock for those stock
options that had exercise prices lower than the fair value of the
Company’s common stock. The aggregate intrinsic value of
stock options exercised was $0.1 million and
$13.9 million during the years ended December 31, 2016
and 2015, respectively.</p>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-TOP: 12pt; TEXT-INDENT: 4%">
The Company received cash proceeds from the exercise of stock
options of less than $0.1 million and $0.8 million during
the years ended December 31, 2016 and 2015, respectively.</p>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-TOP: 12pt; TEXT-INDENT: 4%">
The weighted average grant-date fair value of stock options granted
to employees and directors during the years ended December 31,
2016, 2015 and 2014 was $4.86, $28.97 and $11.73 per share,
respectively.</p>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-TOP: 12pt; TEXT-INDENT: 4%">
As of December 31, 2016 and 2015, there were outstanding
unvested service-based stock options held by nonemployees for the
purchase of 6,401 and 9,363 shares of common stock,
respectively.</p>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-TOP: 18pt">
<b>Restricted Stock Awards</b></p>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-TOP: 6pt; TEXT-INDENT: 4%">
The 2006 Plan provides for the award of restricted stock awards.
The Company has granted restricted stock awards with time-based
vesting conditions. Unvested shares of restricted stock awards may
not be sold or transferred by the holder. These restrictions lapse
according to the time-based vesting conditions of each award. The
Company values restricted stock awards on the grant-date using the
grant-date market price of the Company’s common stock.</p>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-TOP: 12pt; TEXT-INDENT: 4%">
There were no restricted stock awards that vested in the years
ended December 31, 2016, 2015 or 2014. The aggregate intrinsic
value of restricted stock awards is calculated as the fair value of
the Company’s common stock on the date it vests and is
released. The Company did not grant any restricted stock awards
during the years ended December 31, 2016, 2015 or 2014. As of
December 31, 2016, 2015 and 2014, there were no unvested
restricted stock awards subject to repurchase.</p>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-TOP: 18pt">
<b>Restricted Stock Units</b></p>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-TOP: 6pt; TEXT-INDENT: 4%">
The 2014 Stock Option Plan provides for the award of restricted
stock units. The Company has granted restricted stock units with
time-based vesting conditions. The restrictions lapse according to
the time based vesting conditions of each award. The Company values
restricted stock units on the grant-date using the grant-date
market price of the Company’s common stock.</p>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-TOP: 12pt; TEXT-INDENT: 4%">
The aggregate intrinsic value of restricted stock units that vested
during the years ended December 31, 2016 and 2015 was
$0.1 million. There were no restricted stock units that vested
in the year ended December 31, 2014. The aggregate intrinsic
value of restricted stock units is calculated as the fair value of
the Company’s common stock on the date it vests and is
released. During the years ended December 31, 2016 and 2015,
the Company granted 13,273 and 4,769 restricted stock units, all of
which vested during 2016 and 2015, respectively, at a weighted
average grant-date fair value of $7.91 and $34.46, respectively.
The Company did not grant any restricted stock units during the
year ended December 31, 2014. As of December 31, 2016,
2015 and 2014, there were no unvested restricted stock units
outstanding.</p>
<p style="MARGIN-BOTTOM: 0px; FONT-SIZE: 1px; MARGIN-TOP: 18px">
 </p>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-TOP: 0pt">
<b>Stock-based Compensation</b></p>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-TOP: 6pt; TEXT-INDENT: 4%">
The Company recorded stock-based compensation expense related to
stock options and restricted common stock in the following expense
categories within its consolidated statements of operations:</p>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 12pt; MARGIN-TOP: 0pt">
 </p>
<table style="FONT-SIZE: 8pt; FONT-FAMILY: Times New Roman; BORDER-COLLAPSE: collapse" cellspacing="0" cellpadding="0" width="100%" align="center" border="0">
<tr>
<td width="63%"></td>
<td valign="bottom" width="3%"></td>
<td></td>
<td></td>
<td></td>
<td valign="bottom" width="3%"></td>
<td></td>
<td></td>
<td></td>
<td valign="bottom" width="3%"></td>
<td></td>
<td></td>
<td></td>
</tr>
<tr style="FONT-SIZE: 8pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid">
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td style="BORDER-BOTTOM: rgb(0,0,0) 1pt solid" valign="bottom" colspan="10" align="center"><b>Year Ended
December 31,</b></td>
<td valign="bottom"> </td>
</tr>
<tr style="FONT-SIZE: 8pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid">
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td style="BORDER-BOTTOM: rgb(0,0,0) 1pt solid" valign="bottom" colspan="2" align="center"><b>2016</b></td>
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td style="BORDER-BOTTOM: rgb(0,0,0) 1pt solid" valign="bottom" colspan="2" align="center"><b>2015</b></td>
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td style="BORDER-BOTTOM: rgb(0,0,0) 1pt solid" valign="bottom" colspan="2" align="center"><b>2014</b></td>
<td valign="bottom"> </td>
</tr>
<tr style="FONT-SIZE: 8pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid">
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td valign="bottom" colspan="10" align="center"><b>(in
thousands)</b></td>
<td valign="bottom"> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid" bgcolor="#CCEEFF">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-LEFT: 1em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Research and development</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom">$</td>
<td valign="bottom" align="right">3,543</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom">$</td>
<td valign="bottom" align="right">2,930</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom">$</td>
<td valign="bottom" align="right">
         490</td>
<td valign="bottom" nowrap="nowrap"> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-LEFT: 1em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
General and administrative</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">6,390</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">5,652</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">1,063</td>
<td valign="bottom" nowrap="nowrap"> </td>
</tr>
<tr style="FONT-SIZE: 1px">
<td valign="bottom"></td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid" bgcolor="#CCEEFF">
<td valign="top"></td>
<td valign="bottom">  </td>
<td valign="bottom">$</td>
<td valign="bottom" align="right">
         9,933</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom">$</td>
<td valign="bottom" align="right">
         8,582</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom">$</td>
<td valign="bottom" align="right">1,553</td>
<td valign="bottom" nowrap="nowrap"> </td>
</tr>
<tr style="FONT-SIZE: 1px">
<td valign="bottom"></td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
</tr>
</table>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-TOP: 12pt; TEXT-INDENT: 4%">
In addition, during the year ended December 31, 2016, in
connection with its strategic restructuring further discussed in
Note 14, the Company recorded a <font style="WHITE-SPACE: nowrap">one-time,</font> <font style="WHITE-SPACE: nowrap">non-cash</font> stock option modification
expense of $0.2 million, which is included in the stock-based
compensation expense line items of both the consolidated statements
of cash flows and the consolidated statements of changes in
redeemable convertible preferred stock and stockholders’
equity (deficit).</p>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-TOP: 12pt; TEXT-INDENT: 4%">
As of December 31, 2016, the Company had an aggregate of
$14.1 million of unrecognized stock-based compensation cost,
which is expected to be recognized over a weighted average period
of 2.2 years.</p>
</div>
<div>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-TOP: 18pt">
<b>Net Income (Loss) Per Share</b></p>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-TOP: 6pt; TEXT-INDENT: 4%">
Upon the closing of the Company’s IPO in June 2014, all of
the Company’s outstanding redeemable convertible preferred
shares were converted into shares of common stock. Prior to this
conversion, the Company followed the <font style="WHITE-SPACE: nowrap">two-class</font> method when computing net
income (loss) per share as the Company had issued shares that meet
the definition of participating securities. The <font style="WHITE-SPACE: nowrap">two-class</font> method determines net income
(loss) per share for each class of common and participating
securities according to dividends declared or accumulated and
participation rights in undistributed earnings. The <font style="WHITE-SPACE: nowrap">two-class</font> method requires income
available to common stockholders for the period to be allocated
between common and participating securities based upon their
respective rights to receive dividends as if all income for the
period had been distributed. The Company’s redeemable
convertible preferred shares contractually entitled the holders of
such shares to participate in dividends, but did not contractually
require the holders of such shares to participate in losses of the
Company. Accordingly, the <font style="WHITE-SPACE: nowrap">two-class</font> method did not apply for
periods in which the Company reported a net loss or a net loss
attributable to common stockholders resulting from dividends or
accretion related to its redeemable convertible preferred
shares.</p>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-TOP: 12pt; TEXT-INDENT: 4%">
Basic net income (loss) per share is computed by dividing the net
income (loss) attributable to common stockholders by the weighted
average number of common shares outstanding for the period. Diluted
net income (loss) per share attributable to common stockholders is
computed by dividing the diluted net income (loss) attributable to
common stockholders by the weighted average number of common
shares, including potential dilutive common shares assuming the
dilutive effect of outstanding stock options and unvested
restricted common shares, as determined using the treasury stock
method. For periods in which the Company has reported net losses,
diluted net loss per common share attributable to common
stockholders is the same as basic net loss per common share
attributable to common stockholders, since dilutive common shares
are not assumed to have been issued if their effect is
antidilutive.</p>
</div>
FY
0.013
-57751000
<div>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-TOP: 18pt">
<b>Comprehensive Loss</b></p>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-TOP: 6pt; TEXT-INDENT: 4%">
Comprehensive loss includes net loss as well as other changes in
stockholders’ equity (deficit) that result from transactions
and economic events other than those with stockholders. For the
years ended December 31, 2016, 2015 and 2014, the
Company’s only element of other comprehensive loss was
unrealized gain or loss on marketable securities.</p>
</div>
Accelerated Filer
No
<div>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-TOP: 18pt">
<b>Deferred Offering Costs</b></p>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-TOP: 6pt; TEXT-INDENT: 4%">
The Company capitalizes certain legal, accounting and other
third-party fees that are directly associated with <font style="WHITE-SPACE: nowrap">in-process</font> equity financings as other
assets until such financings are consummated. After consummation of
the equity financing, these costs are recorded in
stockholders’ equity (deficit) as a reduction of additional
<font style="WHITE-SPACE: nowrap">paid-in</font> capital generated
as a result of the offering or as a reduction to the carrying value
of preferred stock issued.</p>
</div>
<div>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; WHITE-SPACE: normal; WORD-SPACING: 0px; TEXT-TRANSFORM: none; FONT-WEIGHT: normal; COLOR: rgb(0,0,0); FONT-STYLE: normal; ORPHANS: 2; WIDOWS: 2; MARGIN-TOP: 18pt; LETTER-SPACING: normal; TEXT-INDENT: 0px; font-variant-ligatures: normal; font-variant-caps: normal; -webkit-text-stroke-width: 0px">
<b>3. Fair Value Measurements and Marketable Securities</b></p>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; WHITE-SPACE: normal; WORD-SPACING: 0px; TEXT-TRANSFORM: none; FONT-WEIGHT: normal; COLOR: rgb(0,0,0); FONT-STYLE: normal; ORPHANS: 2; WIDOWS: 2; MARGIN-TOP: 6pt; LETTER-SPACING: normal; TEXT-INDENT: 0px; font-variant-ligatures: normal; font-variant-caps: normal; -webkit-text-stroke-width: 0px">
<b>Fair Value Measurements</b></p>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; WHITE-SPACE: normal; WORD-SPACING: 0px; TEXT-TRANSFORM: none; FONT-WEIGHT: normal; COLOR: rgb(0,0,0); FONT-STYLE: normal; ORPHANS: 2; WIDOWS: 2; MARGIN-TOP: 6pt; LETTER-SPACING: normal; TEXT-INDENT: 4%; font-variant-ligatures: normal; font-variant-caps: normal; -webkit-text-stroke-width: 0px">
The following tables present information about the Company’s
financial assets that have been measured at fair value as of
December 31, 2016 and 2015, and indicate the fair value of the
hierarchy of the valuation inputs utilized to determine such fair
value. In general, fair values determined by Level 1 inputs
utilize quoted prices (unadjusted) in active markets for identical
assets or liabilities. Fair value determined by Level 2 inputs
utilize observable inputs other than Level 1 prices, such as
quoted prices, for similar assets or liabilities, quoted market
prices in markets that are not active or other inputs that are
observable or can be corroborated by observable market data for
substantially the full term of the related assets or liabilities.
Fair values determined by Level 3 inputs are unobservable data
points for the asset or liability, and include situations where
there is little, if any, market activity for the asset or
liability.</p>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; WHITE-SPACE: normal; WORD-SPACING: 0px; TEXT-TRANSFORM: none; FONT-WEIGHT: normal; COLOR: rgb(0,0,0); FONT-STYLE: normal; ORPHANS: 2; WIDOWS: 2; MARGIN-TOP: 12pt; LETTER-SPACING: normal; TEXT-INDENT: 4%; font-variant-ligatures: normal; font-variant-caps: normal; -webkit-text-stroke-width: 0px">
The following tables summarize the Company’s cash equivalents
and marketable securities as of December 31, 2016 and
2015:</p>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 12pt; FONT-FAMILY: "Times New Roman"; WHITE-SPACE: normal; WORD-SPACING: 0px; TEXT-TRANSFORM: none; FONT-WEIGHT: normal; COLOR: rgb(0,0,0); FONT-STYLE: normal; ORPHANS: 2; WIDOWS: 2; MARGIN-TOP: 0pt; LETTER-SPACING: normal; TEXT-INDENT: 0px; font-variant-ligatures: normal; font-variant-caps: normal; -webkit-text-stroke-width: 0px">
 </p>
<table style="FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; WORD-SPACING: 0px; BORDER-COLLAPSE: collapse; TEXT-TRANSFORM: none; ORPHANS: 2; WIDOWS: 2; LETTER-SPACING: normal; TEXT-INDENT: 0px; -webkit-text-stroke-width: 0px" cellspacing="0" cellpadding="0" width="92%" align="center" border="0">
<tr>
<td width="53%"></td>
<td valign="bottom" width="6%"></td>
<td></td>
<td></td>
<td></td>
<td valign="bottom" width="6%"></td>
<td></td>
<td></td>
<td></td>
<td valign="bottom" width="6%"></td>
<td></td>
<td></td>
<td></td>
<td valign="bottom" width="6%"></td>
<td></td>
<td></td>
<td></td>
</tr>
<tr style="FONT-SIZE: 8pt; FONT-FAMILY: "Times New Roman"; break-inside: avoid">
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td style="BORDER-BOTTOM: rgb(0,0,0) 1pt solid" valign="bottom" colspan="14" align="center"><b>December 31, 2016</b></td>
<td valign="bottom"> </td>
</tr>
<tr style="FONT-SIZE: 8pt; FONT-FAMILY: "Times New Roman"; break-inside: avoid">
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td style="BORDER-BOTTOM: rgb(0,0,0) 1pt solid" valign="bottom" colspan="2" align="center"><b>Total</b></td>
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td style="BORDER-BOTTOM: rgb(0,0,0) 1pt solid" valign="bottom" colspan="2" align="center"><b>Quoted<br />
Prices in<br />
Active<br />
Markets<br />
(Level 1)</b></td>
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td style="BORDER-BOTTOM: rgb(0,0,0) 1pt solid" valign="bottom" colspan="2" align="center"><b>Significant<br />
Other<br />
Observable<br />
Inputs<br />
(Level 2)</b></td>
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td style="BORDER-BOTTOM: rgb(0,0,0) 1pt solid" valign="bottom" colspan="2" align="center"><b>Significant<br />
Unobservable<br />
Inputs<br />
(Level 3)</b></td>
<td valign="bottom"> </td>
</tr>
<tr style="FONT-SIZE: 8pt; FONT-FAMILY: "Times New Roman"; break-inside: avoid">
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td valign="bottom" colspan="14" align="center"><b>(in
thousands)</b></td>
<td valign="bottom"> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; break-inside: avoid" bgcolor="#CCEEFF">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; MARGIN-LEFT: 1em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
<b>Cash equivalents:</b></p>
</td>
<td valign="bottom">  </td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom">  </td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom">  </td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom">  </td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom"></td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; break-inside: avoid">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; MARGIN-LEFT: 3em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Money market funds</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom">$</td>
<td valign="bottom" align="right">22,091</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom">$</td>
<td valign="bottom" align="right">22,091</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom" nowrap="nowrap">$</td>
<td valign="bottom" nowrap="nowrap" align="right">
—  </td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom" nowrap="nowrap">$</td>
<td valign="bottom" nowrap="nowrap" align="right">
—  </td>
<td valign="bottom" nowrap="nowrap"> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; break-inside: avoid" bgcolor="#CCEEFF">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; MARGIN-LEFT: 3em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Commercial paper</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">2,997</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom" nowrap="nowrap" align="right">
—  </td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">2,997</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom" nowrap="nowrap" align="right">
—  </td>
<td valign="bottom" nowrap="nowrap"> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; break-inside: avoid">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; MARGIN-LEFT: 3em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Corporate bonds</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">1,500</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom" nowrap="nowrap" align="right">
—  </td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">1,500</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom" nowrap="nowrap" align="right">
—  </td>
<td valign="bottom" nowrap="nowrap"> </td>
</tr>
<tr style="FONT-SIZE: 1px">
<td valign="bottom"></td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; break-inside: avoid" bgcolor="#CCEEFF">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; MARGIN-LEFT: 5em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Total cash equivalents</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">26,588</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">22,091</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">4,497</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom" nowrap="nowrap" align="right">
—  </td>
<td valign="bottom" nowrap="nowrap"> </td>
</tr>
<tr style="FONT-SIZE: 1px">
<td valign="bottom"></td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; break-inside: avoid">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; MARGIN-LEFT: 1em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
<b>Marketable securities:</b></p>
</td>
<td valign="bottom">  </td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom">  </td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom">  </td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom">  </td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom"></td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; break-inside: avoid" bgcolor="#CCEEFF">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; MARGIN-LEFT: 3em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Corporate bonds</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">69,622</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom" nowrap="nowrap" align="right">
—  </td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">69,622</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom" nowrap="nowrap" align="right">
—  </td>
<td valign="bottom" nowrap="nowrap"> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; break-inside: avoid">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; MARGIN-LEFT: 3em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Commercial paper</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">27,220</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom" nowrap="nowrap" align="right">
—  </td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">27,220</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom" nowrap="nowrap" align="right">
—  </td>
<td valign="bottom" nowrap="nowrap"> </td>
</tr>
<tr style="FONT-SIZE: 1px">
<td valign="bottom"></td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; break-inside: avoid" bgcolor="#CCEEFF">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; MARGIN-LEFT: 5em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Total marketable securities</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">96,842</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom" nowrap="nowrap" align="right">
—  </td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">96,842</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom" nowrap="nowrap" align="right">
—  </td>
<td valign="bottom" nowrap="nowrap"> </td>
</tr>
<tr style="FONT-SIZE: 1px">
<td valign="bottom"></td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; break-inside: avoid">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; MARGIN-LEFT: 1em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Total cash equivalents and marketable securities</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom">$</td>
<td valign="bottom" align="right">123,430</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom">$</td>
<td valign="bottom" align="right">22,091</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom">$</td>
<td valign="bottom" align="right">101,339</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom" nowrap="nowrap">$</td>
<td valign="bottom" nowrap="nowrap" align="right">
—  </td>
<td valign="bottom" nowrap="nowrap"> </td>
</tr>
<tr style="FONT-SIZE: 1px">
<td valign="bottom"></td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
</tr>
</table>
<p style="MARGIN-BOTTOM: 0px; FONT-SIZE: 1px; FONT-FAMILY: "Times New Roman"; WHITE-SPACE: normal; WORD-SPACING: 0px; TEXT-TRANSFORM: none; FONT-WEIGHT: normal; COLOR: rgb(0,0,0); FONT-STYLE: normal; ORPHANS: 2; WIDOWS: 2; MARGIN-TOP: 12px; LETTER-SPACING: normal; TEXT-INDENT: 0px; font-variant-ligatures: normal; font-variant-caps: normal; -webkit-text-stroke-width: 0px">
 </p>
<table style="FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; WORD-SPACING: 0px; BORDER-COLLAPSE: collapse; TEXT-TRANSFORM: none; ORPHANS: 2; WIDOWS: 2; LETTER-SPACING: normal; TEXT-INDENT: 0px; -webkit-text-stroke-width: 0px" cellspacing="0" cellpadding="0" width="92%" align="center" border="0">
<tr>
<td width="53%"></td>
<td valign="bottom" width="6%"></td>
<td></td>
<td></td>
<td></td>
<td valign="bottom" width="6%"></td>
<td></td>
<td></td>
<td></td>
<td valign="bottom" width="6%"></td>
<td></td>
<td></td>
<td></td>
<td valign="bottom" width="6%"></td>
<td></td>
<td></td>
<td></td>
</tr>
<tr style="FONT-SIZE: 8pt; FONT-FAMILY: "Times New Roman"; break-inside: avoid">
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td style="BORDER-BOTTOM: rgb(0,0,0) 1pt solid" valign="bottom" colspan="14" align="center"><b>December 31, 2015</b></td>
<td valign="bottom"> </td>
</tr>
<tr style="FONT-SIZE: 8pt; FONT-FAMILY: "Times New Roman"; break-inside: avoid">
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td style="BORDER-BOTTOM: rgb(0,0,0) 1pt solid" valign="bottom" colspan="2" align="center"><b>Total</b></td>
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td style="BORDER-BOTTOM: rgb(0,0,0) 1pt solid" valign="bottom" colspan="2" align="center"><b>Quoted<br />
Prices in<br />
Active<br />
Markets<br />
(Level 1)</b></td>
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td style="BORDER-BOTTOM: rgb(0,0,0) 1pt solid" valign="bottom" colspan="2" align="center"><b>Significant<br />
Other<br />
Observable<br />
Inputs<br />
(Level 2)</b></td>
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td style="BORDER-BOTTOM: rgb(0,0,0) 1pt solid" valign="bottom" colspan="2" align="center"><b>Significant<br />
Unobservable<br />
Inputs<br />
(Level 3)</b></td>
<td valign="bottom"> </td>
</tr>
<tr style="FONT-SIZE: 8pt; FONT-FAMILY: "Times New Roman"; break-inside: avoid">
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td valign="bottom" colspan="14" align="center"><b>(in
thousands)</b></td>
<td valign="bottom"> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; break-inside: avoid" bgcolor="#CCEEFF">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; MARGIN-LEFT: 1em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
<b>Cash equivalents:</b></p>
</td>
<td valign="bottom">  </td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom">  </td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom">  </td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom">  </td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom"></td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; break-inside: avoid">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; MARGIN-LEFT: 3em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Money market funds</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom">$</td>
<td valign="bottom" align="right">13,231</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom">$</td>
<td valign="bottom" align="right">13,231</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom" nowrap="nowrap">$</td>
<td valign="bottom" nowrap="nowrap" align="right">
—  </td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom" nowrap="nowrap">$</td>
<td valign="bottom" nowrap="nowrap" align="right">
—  </td>
<td valign="bottom" nowrap="nowrap"> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; break-inside: avoid" bgcolor="#CCEEFF">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; MARGIN-LEFT: 3em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
U.S. government securities</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">4,999</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom" nowrap="nowrap" align="right">
—  </td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">4,999</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom" nowrap="nowrap" align="right">
—  </td>
<td valign="bottom" nowrap="nowrap"> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; break-inside: avoid">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; MARGIN-LEFT: 3em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Commercial paper</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">4,697</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom" nowrap="nowrap" align="right">
—  </td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">4,697</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom" nowrap="nowrap" align="right">
—  </td>
<td valign="bottom" nowrap="nowrap"> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; break-inside: avoid" bgcolor="#CCEEFF">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; MARGIN-LEFT: 3em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Corporate bonds</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">3,000</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom" nowrap="nowrap" align="right">
—  </td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">3,000</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom" nowrap="nowrap" align="right">
—  </td>
<td valign="bottom" nowrap="nowrap"> </td>
</tr>
<tr style="FONT-SIZE: 1px">
<td valign="bottom"></td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; break-inside: avoid">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; MARGIN-LEFT: 5em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Total cash equivalents</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">25,927</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">13,231</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">12,696</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom" nowrap="nowrap" align="right">
—  </td>
<td valign="bottom" nowrap="nowrap"> </td>
</tr>
<tr style="FONT-SIZE: 1px">
<td valign="bottom"></td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; break-inside: avoid" bgcolor="#CCEEFF">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; MARGIN-LEFT: 1em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
<b>Marketable securities:</b></p>
</td>
<td valign="bottom">  </td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom">  </td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom">  </td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom">  </td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom"></td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; break-inside: avoid">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; MARGIN-LEFT: 3em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Corporate bonds</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">125,516</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom" nowrap="nowrap" align="right">
—  </td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">125,516</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom" nowrap="nowrap" align="right">
—  </td>
<td valign="bottom" nowrap="nowrap"> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; break-inside: avoid" bgcolor="#CCEEFF">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; MARGIN-LEFT: 3em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Commercial paper</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">19,468</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom" nowrap="nowrap" align="right">
—  </td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">19,468</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom" nowrap="nowrap" align="right">
—  </td>
<td valign="bottom" nowrap="nowrap"> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; break-inside: avoid">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; MARGIN-LEFT: 3em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
U.S. government securities</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">4,500</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom" nowrap="nowrap" align="right">
—  </td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">4,500</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom" nowrap="nowrap" align="right">
—  </td>
<td valign="bottom" nowrap="nowrap"> </td>
</tr>
<tr style="FONT-SIZE: 1px">
<td valign="bottom"></td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; break-inside: avoid" bgcolor="#CCEEFF">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; MARGIN-LEFT: 5em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Total marketable securities</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">149,484</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom" nowrap="nowrap" align="right">
—  </td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">149,484</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom" nowrap="nowrap" align="right">
—  </td>
<td valign="bottom" nowrap="nowrap"> </td>
</tr>
<tr style="FONT-SIZE: 1px">
<td valign="bottom"></td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; break-inside: avoid">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; MARGIN-LEFT: 1em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Total cash equivalents and marketable securities</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom">$</td>
<td valign="bottom" align="right">175,411</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom">$</td>
<td valign="bottom" align="right">13,231</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom">$</td>
<td valign="bottom" align="right">162,180</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom" nowrap="nowrap">$</td>
<td valign="bottom" nowrap="nowrap" align="right">
—  </td>
<td valign="bottom" nowrap="nowrap"> </td>
</tr>
<tr style="FONT-SIZE: 1px">
<td valign="bottom"></td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
</tr>
</table>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; WHITE-SPACE: normal; WORD-SPACING: 0px; TEXT-TRANSFORM: none; FONT-WEIGHT: normal; COLOR: rgb(0,0,0); FONT-STYLE: normal; ORPHANS: 2; WIDOWS: 2; MARGIN-TOP: 12pt; LETTER-SPACING: normal; TEXT-INDENT: 4%; font-variant-ligatures: normal; font-variant-caps: normal; -webkit-text-stroke-width: 0px">
The carrying amounts reflected in the consolidated balance sheets
for tax incentive receivable, accounts payable, and accrued
expenses approximate fair value due to their short-term maturities.
The carrying value of the Company’s outstanding notes payable
approximates fair value (a Level 2 fair value measurement),
reflecting interest rates currently available to the Company.</p>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; WHITE-SPACE: normal; WORD-SPACING: 0px; TEXT-TRANSFORM: none; FONT-WEIGHT: normal; COLOR: rgb(0,0,0); FONT-STYLE: normal; ORPHANS: 2; WIDOWS: 2; MARGIN-TOP: 18pt; LETTER-SPACING: normal; TEXT-INDENT: 0px; font-variant-ligatures: normal; font-variant-caps: normal; -webkit-text-stroke-width: 0px">
<b>Marketable Securities</b></p>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; WHITE-SPACE: normal; WORD-SPACING: 0px; TEXT-TRANSFORM: none; FONT-WEIGHT: normal; COLOR: rgb(0,0,0); FONT-STYLE: normal; ORPHANS: 2; WIDOWS: 2; MARGIN-TOP: 6pt; LETTER-SPACING: normal; TEXT-INDENT: 4%; font-variant-ligatures: normal; font-variant-caps: normal; -webkit-text-stroke-width: 0px">
The following tables summarize the Company’s marketable
securities as of December 31, 2016 and 2015:</p>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 12pt; FONT-FAMILY: "Times New Roman"; WHITE-SPACE: normal; WORD-SPACING: 0px; TEXT-TRANSFORM: none; FONT-WEIGHT: normal; COLOR: rgb(0,0,0); FONT-STYLE: normal; ORPHANS: 2; WIDOWS: 2; MARGIN-TOP: 0pt; LETTER-SPACING: normal; TEXT-INDENT: 0px; font-variant-ligatures: normal; font-variant-caps: normal; -webkit-text-stroke-width: 0px">
 </p>
<table style="FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; WORD-SPACING: 0px; BORDER-COLLAPSE: collapse; TEXT-TRANSFORM: none; ORPHANS: 2; WIDOWS: 2; LETTER-SPACING: normal; TEXT-INDENT: 0px; -webkit-text-stroke-width: 0px" cellspacing="0" cellpadding="0" width="92%" align="center" border="0">
<tr>
<td width="58%"></td>
<td valign="bottom" width="6%"></td>
<td></td>
<td></td>
<td></td>
<td valign="bottom" width="6%"></td>
<td></td>
<td></td>
<td></td>
<td valign="bottom" width="6%"></td>
<td></td>
<td></td>
<td></td>
<td valign="bottom" width="6%"></td>
<td></td>
<td></td>
<td></td>
</tr>
<tr style="FONT-SIZE: 8pt; FONT-FAMILY: "Times New Roman"; break-inside: avoid">
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td style="BORDER-BOTTOM: rgb(0,0,0) 1pt solid" valign="bottom" colspan="14" align="center"><b>December 31, 2016</b></td>
<td valign="bottom"> </td>
</tr>
<tr style="FONT-SIZE: 8pt; FONT-FAMILY: "Times New Roman"; break-inside: avoid">
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td style="BORDER-BOTTOM: rgb(0,0,0) 1pt solid" valign="bottom" colspan="2" align="center"><b>Amortized<br />
Cost</b></td>
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td style="BORDER-BOTTOM: rgb(0,0,0) 1pt solid" valign="bottom" colspan="2" align="center"><b>Gross<br />
Unrealized<br />
Gains</b></td>
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td style="BORDER-BOTTOM: rgb(0,0,0) 1pt solid" valign="bottom" colspan="2" align="center"><b>Gross<br />
Unrealized<br />
Losses</b></td>
<td valign="bottom"> </td>
<td valign="bottom"> </td>
<td style="BORDER-BOTTOM: rgb(0,0,0) 1pt solid" valign="bottom" colspan="2" align="center"><b>Fair Value</b></td>
<td valign="bottom"> </td>
</tr>
<tr style="FONT-SIZE: 8pt; FONT-FAMILY: "Times New Roman"; break-inside: avoid">
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td valign="bottom" colspan="14" align="center"><b>(in
thousands)</b></td>
<td valign="bottom"> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; break-inside: avoid" bgcolor="#CCEEFF">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; MARGIN-LEFT: 1em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
<b>Assets:</b></p>
</td>
<td valign="bottom">  </td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom">  </td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom">  </td>
<td valign="bottom"></td>
<td valign="bottom" colspan="5"></td>
<td valign="bottom"></td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; break-inside: avoid">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; MARGIN-LEFT: 3em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Corporate bonds (due within 1 year)</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom">$</td>
<td valign="bottom" align="right">68,777</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom" nowrap="nowrap">$</td>
<td valign="bottom" nowrap="nowrap" align="right">
—  </td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom">$</td>
<td valign="bottom" align="right">(54</td>
<td valign="bottom" nowrap="nowrap">) </td>
<td valign="bottom"> </td>
<td valign="bottom">$</td>
<td valign="bottom" align="right">68,723</td>
<td valign="bottom" nowrap="nowrap"> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; break-inside: avoid" bgcolor="#CCEEFF">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; MARGIN-LEFT: 3em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Corporate bonds (due after 1 year through 2 years)</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">901</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom" nowrap="nowrap" align="right">
—  </td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">(2</td>
<td valign="bottom" nowrap="nowrap">) </td>
<td valign="bottom"> </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">899</td>
<td valign="bottom" nowrap="nowrap"> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; break-inside: avoid">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; MARGIN-LEFT: 3em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Commercial paper (due within 1 year)</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">27,244</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom" nowrap="nowrap" align="right">
—  </td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">(24</td>
<td valign="bottom" nowrap="nowrap">) </td>
<td valign="bottom"> </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">27,220</td>
<td valign="bottom" nowrap="nowrap"> </td>
</tr>
<tr style="FONT-SIZE: 1px">
<td valign="bottom"></td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
<td valign="bottom"> </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; break-inside: avoid" bgcolor="#CCEEFF">
<td valign="top"></td>
<td valign="bottom">  </td>
<td valign="bottom">$</td>
<td valign="bottom" align="right">96,922</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom" nowrap="nowrap">$</td>
<td valign="bottom" nowrap="nowrap" align="right">
—  </td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom">$</td>
<td valign="bottom" align="right">(80</td>
<td valign="bottom" nowrap="nowrap">) </td>
<td valign="bottom"> </td>
<td valign="bottom">$</td>
<td valign="bottom" align="right">96,842</td>
<td valign="bottom" nowrap="nowrap"> </td>
</tr>
<tr style="FONT-SIZE: 1px">
<td valign="bottom"></td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
<td valign="bottom"> </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
</tr>
</table>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 12pt; FONT-FAMILY: "Times New Roman"; WHITE-SPACE: normal; WORD-SPACING: 0px; TEXT-TRANSFORM: none; FONT-WEIGHT: normal; COLOR: rgb(0,0,0); FONT-STYLE: normal; ORPHANS: 2; WIDOWS: 2; MARGIN-TOP: 0pt; LETTER-SPACING: normal; TEXT-INDENT: 0px; font-variant-ligatures: normal; font-variant-caps: normal; -webkit-text-stroke-width: 0px">
 </p>
<table style="FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; WORD-SPACING: 0px; BORDER-COLLAPSE: collapse; TEXT-TRANSFORM: none; ORPHANS: 2; WIDOWS: 2; LETTER-SPACING: normal; TEXT-INDENT: 0px; -webkit-text-stroke-width: 0px" cellspacing="0" cellpadding="0" width="92%" align="center" border="0">
<tr>
<td width="61%"></td>
<td valign="bottom" width="5%"></td>
<td></td>
<td></td>
<td></td>
<td valign="bottom" width="5%"></td>
<td></td>
<td></td>
<td></td>
<td valign="bottom" width="5%"></td>
<td></td>
<td></td>
<td></td>
<td valign="bottom" width="5%"></td>
<td></td>
<td></td>
<td></td>
</tr>
<tr style="FONT-SIZE: 8pt; FONT-FAMILY: "Times New Roman"; break-inside: avoid">
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td style="BORDER-BOTTOM: rgb(0,0,0) 1pt solid" valign="bottom" colspan="14" align="center"><b>December 31, 2015</b></td>
<td valign="bottom"> </td>
</tr>
<tr style="FONT-SIZE: 8pt; FONT-FAMILY: "Times New Roman"; break-inside: avoid">
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td style="BORDER-BOTTOM: rgb(0,0,0) 1pt solid" valign="bottom" colspan="2" align="center"><b>Amortized<br />
Cost</b></td>
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td style="BORDER-BOTTOM: rgb(0,0,0) 1pt solid" valign="bottom" colspan="2" align="center"><b>Gross<br />
Unrealized<br />
Gains</b></td>
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td style="BORDER-BOTTOM: rgb(0,0,0) 1pt solid" valign="bottom" colspan="2" align="center"><b>Gross<br />
Unrealized<br />
Losses</b></td>
<td valign="bottom"> </td>
<td valign="bottom"> </td>
<td style="BORDER-BOTTOM: rgb(0,0,0) 1pt solid" valign="bottom" colspan="2" align="center"><b>Fair Value</b></td>
<td valign="bottom"> </td>
</tr>
<tr style="FONT-SIZE: 8pt; FONT-FAMILY: "Times New Roman"; break-inside: avoid">
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td valign="bottom" colspan="14" align="center"><b>(in
thousands)</b></td>
<td valign="bottom"> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; break-inside: avoid" bgcolor="#CCEEFF">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; MARGIN-LEFT: 1em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
<b>Assets:</b></p>
</td>
<td valign="bottom">  </td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom">  </td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom">  </td>
<td valign="bottom"></td>
<td valign="bottom" colspan="5"></td>
<td valign="bottom"></td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; break-inside: avoid">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; MARGIN-LEFT: 3em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Corporate bonds (due within 1 year)</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom">$</td>
<td valign="bottom" align="right">112,828</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom">$</td>
<td valign="bottom" align="right">1</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom">$</td>
<td valign="bottom" align="right">(169</td>
<td valign="bottom" nowrap="nowrap">) </td>
<td valign="bottom"> </td>
<td valign="bottom">$</td>
<td valign="bottom" align="right">112,660</td>
<td valign="bottom" nowrap="nowrap"> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; break-inside: avoid" bgcolor="#CCEEFF">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; MARGIN-LEFT: 3em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Corporate bonds (due after 1 year through 2 years)</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">12,885</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">3</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">(32</td>
<td valign="bottom" nowrap="nowrap">) </td>
<td valign="bottom"> </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">12,856</td>
<td valign="bottom" nowrap="nowrap"> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; break-inside: avoid">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; MARGIN-LEFT: 3em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Commercial paper (due within 1 year)</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">19,478</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom" nowrap="nowrap" align="right">
—  </td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">(10</td>
<td valign="bottom" nowrap="nowrap">) </td>
<td valign="bottom"> </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">19,468</td>
<td valign="bottom" nowrap="nowrap"> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; break-inside: avoid" bgcolor="#CCEEFF">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; MARGIN-LEFT: 3em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
U.S. government securities (due within 1 year)</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">4,500</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom" nowrap="nowrap" align="right">
—  </td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom" nowrap="nowrap" align="right">
—  </td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom"> </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">4,500</td>
<td valign="bottom" nowrap="nowrap"> </td>
</tr>
<tr style="FONT-SIZE: 1px">
<td valign="bottom"></td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
<td valign="bottom"> </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; break-inside: avoid">
<td valign="top"></td>
<td valign="bottom">  </td>
<td valign="bottom">$</td>
<td valign="bottom" align="right">149,691</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom">$</td>
<td valign="bottom" align="right">4</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom">$</td>
<td valign="bottom" align="right">(211</td>
<td valign="bottom" nowrap="nowrap">) </td>
<td valign="bottom"> </td>
<td valign="bottom">$</td>
<td valign="bottom" align="right">149,484</td>
<td valign="bottom" nowrap="nowrap"> </td>
</tr>
<tr style="FONT-SIZE: 1px">
<td valign="bottom"></td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
<td valign="bottom"> </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
</tr>
</table>
<br class="Apple-interchange-newline" />
</div>
-18000
<div>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; WHITE-SPACE: normal; WORD-SPACING: 0px; TEXT-TRANSFORM: none; FONT-WEIGHT: normal; COLOR: rgb(0,0,0); FONT-STYLE: normal; ORPHANS: 2; WIDOWS: 2; MARGIN-TOP: 0pt; LETTER-SPACING: normal; TEXT-INDENT: 0px; font-variant-ligatures: normal; font-variant-caps: normal; -webkit-text-stroke-width: 0px">
<b>10. Commitments and Contingencies</b></p>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; WHITE-SPACE: normal; WORD-SPACING: 0px; TEXT-TRANSFORM: none; FONT-WEIGHT: normal; COLOR: rgb(0,0,0); FONT-STYLE: normal; ORPHANS: 2; WIDOWS: 2; MARGIN-TOP: 6pt; LETTER-SPACING: normal; TEXT-INDENT: 0px; font-variant-ligatures: normal; font-variant-caps: normal; -webkit-text-stroke-width: 0px">
<b>Leases</b></p>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; WHITE-SPACE: normal; WORD-SPACING: 0px; TEXT-TRANSFORM: none; FONT-WEIGHT: normal; COLOR: rgb(0,0,0); FONT-STYLE: normal; ORPHANS: 2; WIDOWS: 2; MARGIN-TOP: 6pt; LETTER-SPACING: normal; TEXT-INDENT: 4%; font-variant-ligatures: normal; font-variant-caps: normal; -webkit-text-stroke-width: 0px">
The Company has a lease for office space in Boston, Massachusetts,
effective as of July 28, 2014, with a term expiring
July 31, 2017 and an option to extend the lease for three
additional years. In March 2015, the Company entered into an
operating lease for additional office space in Boston,
Massachusetts, effective as of April 15, 2015, with a term
expiring on July 31, 2017, and two options to extend this
lease for three additional years each. In October 2015, the Company
entered into an operating lease for office space in San Diego,
California, effective as of October 1, 2015, with a term
expiring on September 30, 2019, and an option to extend this
lease for five additional years. In January 2017, the Company
extended the leases for both office spaces in Boston, Massachusetts
with new terms expiring on July 31, 2020. The Company is
currently in negotiations regarding the financial terms of these
extensions. In addition, with the landlord’s consent, the
Company have subleased 2,976 square feet of office space in Boston,
Massachusetts to an unrelated third party beginning on
January 1, 2017 and expiring on December 31, 2017, and
the Company expects to receive approximately $0.1 million in
sublease rental income.</p>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; WHITE-SPACE: normal; WORD-SPACING: 0px; TEXT-TRANSFORM: none; FONT-WEIGHT: normal; COLOR: rgb(0,0,0); FONT-STYLE: normal; ORPHANS: 2; WIDOWS: 2; MARGIN-TOP: 12pt; LETTER-SPACING: normal; TEXT-INDENT: 4%; font-variant-ligatures: normal; font-variant-caps: normal; -webkit-text-stroke-width: 0px">
Future minimum lease payments for its operating leases as of
December 31, 2016 were as follows:</p>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 12pt; FONT-FAMILY: "Times New Roman"; WHITE-SPACE: normal; WORD-SPACING: 0px; TEXT-TRANSFORM: none; FONT-WEIGHT: normal; COLOR: rgb(0,0,0); FONT-STYLE: normal; ORPHANS: 2; WIDOWS: 2; MARGIN-TOP: 0pt; LETTER-SPACING: normal; TEXT-INDENT: 0px; font-variant-ligatures: normal; font-variant-caps: normal; -webkit-text-stroke-width: 0px">
 </p>
<table style="FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; WORD-SPACING: 0px; BORDER-COLLAPSE: collapse; TEXT-TRANSFORM: none; ORPHANS: 2; WIDOWS: 2; LETTER-SPACING: normal; TEXT-INDENT: 0px; -webkit-text-stroke-width: 0px" cellspacing="0" cellpadding="0" width="68%" align="center" border="0">
<tr>
<td width="89%"></td>
<td valign="bottom" width="7%"></td>
<td></td>
<td></td>
<td></td>
</tr>
<tr style="FONT-SIZE: 8pt; FONT-FAMILY: "Times New Roman"; break-inside: avoid">
<td valign="bottom" nowrap="nowrap">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 8pt; FONT-FAMILY: "Times New Roman"; WIDTH: 95.55pt; BORDER-BOTTOM: rgb(0,0,0) 1pt solid; MARGIN-TOP: 0pt">
<b>Years Ending December 31,</b></p>
</td>
<td valign="bottom">  </td>
<td valign="bottom" colspan="2"> </td>
<td valign="bottom"> </td>
</tr>
<tr style="FONT-SIZE: 8pt; FONT-FAMILY: "Times New Roman"; break-inside: avoid">
<td valign="bottom"><b>(in thousands)</b></td>
<td valign="bottom">  </td>
<td valign="bottom" colspan="2"> </td>
<td valign="bottom"> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; break-inside: avoid" bgcolor="#CCEEFF">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; MARGIN-LEFT: 1em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
2017</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom">$</td>
<td valign="bottom" align="right">300</td>
<td valign="bottom" nowrap="nowrap"> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; break-inside: avoid">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; MARGIN-LEFT: 1em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
2018</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">106</td>
<td valign="bottom" nowrap="nowrap"> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; break-inside: avoid" bgcolor="#CCEEFF">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; MARGIN-LEFT: 1em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
2019</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">82</td>
<td valign="bottom" nowrap="nowrap"> </td>
</tr>
<tr style="FONT-SIZE: 1px">
<td valign="bottom"></td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; break-inside: avoid">
<td valign="top"></td>
<td valign="bottom">  </td>
<td valign="bottom">$</td>
<td valign="bottom" align="right">488</td>
<td valign="bottom" nowrap="nowrap"> </td>
</tr>
<tr style="FONT-SIZE: 1px">
<td valign="bottom"></td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
</tr>
</table>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; WHITE-SPACE: normal; WORD-SPACING: 0px; TEXT-TRANSFORM: none; FONT-WEIGHT: normal; COLOR: rgb(0,0,0); FONT-STYLE: normal; ORPHANS: 2; WIDOWS: 2; MARGIN-TOP: 12pt; LETTER-SPACING: normal; TEXT-INDENT: 4%; font-variant-ligatures: normal; font-variant-caps: normal; -webkit-text-stroke-width: 0px">
During the years ended December 31, 2016, 2015 and 2014, the
Company recognized $0.4 million, $0.3 million and
$0.2 million, respectively, of rental expense related to
office space.</p>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; WHITE-SPACE: normal; WORD-SPACING: 0px; TEXT-TRANSFORM: none; FONT-WEIGHT: normal; COLOR: rgb(0,0,0); FONT-STYLE: normal; ORPHANS: 2; WIDOWS: 2; MARGIN-TOP: 18pt; LETTER-SPACING: normal; TEXT-INDENT: 0px; font-variant-ligatures: normal; font-variant-caps: normal; -webkit-text-stroke-width: 0px">
<b>Intellectual Property Licenses</b></p>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; WHITE-SPACE: normal; WORD-SPACING: 0px; TEXT-TRANSFORM: none; FONT-WEIGHT: normal; COLOR: rgb(0,0,0); FONT-STYLE: normal; ORPHANS: 2; WIDOWS: 2; MARGIN-TOP: 6pt; LETTER-SPACING: normal; TEXT-INDENT: 4%; font-variant-ligatures: normal; font-variant-caps: normal; -webkit-text-stroke-width: 0px">
The Company has acquired exclusive rights to develop patented
compounds and related <font style="WHITE-SPACE: nowrap">know-how</font> for beloranib under two
licensing agreements with two third parties in the course of its
research and development activities. The licensing rights obligate
the Company to make payments to the licensors for license fees,
milestones, license maintenance fees and royalties. The Company is
also responsible for patent prosecution costs. Related to these
license agreements, the Company recorded research and development
expenses in its consolidated statements of operations as
follows:</p>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 12pt; FONT-FAMILY: "Times New Roman"; WHITE-SPACE: normal; WORD-SPACING: 0px; TEXT-TRANSFORM: none; FONT-WEIGHT: normal; COLOR: rgb(0,0,0); FONT-STYLE: normal; ORPHANS: 2; WIDOWS: 2; MARGIN-TOP: 0pt; LETTER-SPACING: normal; TEXT-INDENT: 0px; font-variant-ligatures: normal; font-variant-caps: normal; -webkit-text-stroke-width: 0px">
 </p>
<table style="FONT-SIZE: 8pt; FONT-FAMILY: "Times New Roman"; WORD-SPACING: 0px; BORDER-COLLAPSE: collapse; TEXT-TRANSFORM: none; ORPHANS: 2; WIDOWS: 2; LETTER-SPACING: normal; TEXT-INDENT: 0px; -webkit-text-stroke-width: 0px" cellspacing="0" cellpadding="0" width="84%" align="center" border="0">
<tr>
<td width="74%"></td>
<td valign="bottom" width="5%"></td>
<td></td>
<td></td>
<td></td>
<td valign="bottom" width="5%"></td>
<td></td>
<td></td>
<td></td>
<td valign="bottom" width="5%"></td>
<td></td>
<td></td>
<td></td>
</tr>
<tr style="FONT-SIZE: 8pt; FONT-FAMILY: "Times New Roman"; break-inside: avoid">
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td style="BORDER-BOTTOM: rgb(0,0,0) 1pt solid" valign="bottom" colspan="10" align="center">
<b>Year Ended December 31,</b></td>
<td valign="bottom"> </td>
</tr>
<tr style="FONT-SIZE: 8pt; FONT-FAMILY: "Times New Roman"; break-inside: avoid">
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td style="BORDER-BOTTOM: rgb(0,0,0) 1pt solid" valign="bottom" colspan="2" align="center"><b>2016</b></td>
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td style="BORDER-BOTTOM: rgb(0,0,0) 1pt solid" valign="bottom" colspan="2" align="center"><b>2015</b></td>
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td style="BORDER-BOTTOM: rgb(0,0,0) 1pt solid" valign="bottom" colspan="2" align="center"><b>2014</b></td>
<td valign="bottom"> </td>
</tr>
<tr style="FONT-SIZE: 8pt; FONT-FAMILY: "Times New Roman"; break-inside: avoid">
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td valign="bottom" colspan="10" align="center"><b>(in
thousands)</b></td>
<td valign="bottom"> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; break-inside: avoid" bgcolor="#CCEEFF">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; MARGIN-LEFT: 1em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
License, milestone, and license maintenance fees</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom" nowrap="nowrap">$</td>
<td valign="bottom" nowrap="nowrap" align="right">
—  </td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom" nowrap="nowrap">$</td>
<td valign="bottom" nowrap="nowrap" align="right">
—  </td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom">$</td>
<td valign="bottom" align="right">7,019</td>
<td valign="bottom" nowrap="nowrap"> </td>
</tr>
<tr style="FONT-SIZE: 1px">
<td valign="bottom"></td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; break-inside: avoid">
<td valign="top"></td>
<td valign="bottom">  </td>
<td valign="bottom" nowrap="nowrap">$</td>
<td valign="bottom" nowrap="nowrap" align="right">
—  </td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom" nowrap="nowrap">$</td>
<td valign="bottom" nowrap="nowrap" align="right">
—  </td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom">$</td>
<td valign="bottom" align="right">7,019</td>
<td valign="bottom" nowrap="nowrap"> </td>
</tr>
<tr style="FONT-SIZE: 1px">
<td valign="bottom"></td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
</tr>
</table>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; WHITE-SPACE: normal; WORD-SPACING: 0px; TEXT-TRANSFORM: none; FONT-WEIGHT: normal; COLOR: rgb(0,0,0); FONT-STYLE: normal; ORPHANS: 2; WIDOWS: 2; MARGIN-TOP: 12pt; LETTER-SPACING: normal; TEXT-INDENT: 4%; font-variant-ligatures: normal; font-variant-caps: normal; -webkit-text-stroke-width: 0px">
As of December 31, 2016, the Company is obligated to make
additional milestone payments of up to $12.3 million upon
reaching certain <font style="WHITE-SPACE: nowrap">pre-commercialization</font> milestones, such as clinical
trials and government approvals (including the FDA approval of a
New Drug application, or NDA), and up to $12.5 million upon
reaching certain product commercialization milestones related to
the development of beloranib. Under one of the license agreements,
the Company is also obligated to pay up to $1.3 million with
respect to each subsequent licensed product, if any, that is a new
chemical entity. In addition, the Company will owe single-digit
royalties on sales of commercial products developed using these
licensed technologies, if any.</p>
<p style="MARGIN-BOTTOM: 0px; FONT-SIZE: 1px; FONT-FAMILY: "Times New Roman"; WHITE-SPACE: normal; WORD-SPACING: 0px; TEXT-TRANSFORM: none; FONT-WEIGHT: normal; COLOR: rgb(0,0,0); FONT-STYLE: normal; ORPHANS: 2; WIDOWS: 2; MARGIN-TOP: 12px; LETTER-SPACING: normal; TEXT-INDENT: 0px; font-variant-ligatures: normal; font-variant-caps: normal; -webkit-text-stroke-width: 0px">
 </p>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; WHITE-SPACE: normal; WORD-SPACING: 0px; TEXT-TRANSFORM: none; FONT-WEIGHT: normal; COLOR: rgb(0,0,0); FONT-STYLE: normal; ORPHANS: 2; WIDOWS: 2; MARGIN-TOP: 0pt; LETTER-SPACING: normal; TEXT-INDENT: 4%; font-variant-ligatures: normal; font-variant-caps: normal; -webkit-text-stroke-width: 0px">
There were no milestones achieved during the years ended
December 31, 2016 or 2015. During the year ended
December 31, 2014, the Company recorded expenses of
$7.0 million relating to milestones achieved in September 2014
upon the initiation of a first Phase 3 clinical trial including the
cost of the issuance of common stock valued at $3.6 million.
The Company is also obligated to pay to the licensors a percentage
of fees received if and when the Company sublicenses the
technology. As of December 31, 2016, the Company has not yet
developed a commercial product using the licensed technologies and
it has not entered into any sublicense agreements for the
technologies.</p>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; WHITE-SPACE: normal; WORD-SPACING: 0px; TEXT-TRANSFORM: none; FONT-WEIGHT: normal; COLOR: rgb(0,0,0); FONT-STYLE: normal; ORPHANS: 2; WIDOWS: 2; MARGIN-TOP: 18pt; LETTER-SPACING: normal; TEXT-INDENT: 0px; font-variant-ligatures: normal; font-variant-caps: normal; -webkit-text-stroke-width: 0px">
<b>Indemnification Agreements</b></p>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; WHITE-SPACE: normal; WORD-SPACING: 0px; TEXT-TRANSFORM: none; FONT-WEIGHT: normal; COLOR: rgb(0,0,0); FONT-STYLE: normal; ORPHANS: 2; WIDOWS: 2; MARGIN-TOP: 6pt; LETTER-SPACING: normal; TEXT-INDENT: 4%; font-variant-ligatures: normal; font-variant-caps: normal; -webkit-text-stroke-width: 0px">
In the ordinary course of business, the Company may provide
indemnification of varying scope and terms to vendors, lessors,
business partners, and other parties with respect to certain
matters including, but not limited to, losses arising out of breach
of such agreements or from intellectual property infringement
claims made by third parties. In addition, the Company has entered
into indemnification agreements with members of management team and
the board of directors of the Company that will require the
Company, among other things, to indemnify them against certain
liabilities that may arise by reason of their status or service as
directors or officers. The maximum potential amount of future
payments the Company could be required to make under these
indemnification agreements is, in many cases, unlimited. To date,
the Company has not incurred any material costs as a result of such
indemnifications. The Company does not believe that the outcome of
any claims under indemnification arrangements will have a material
effect on its financial position, results of operations or cash
flows, and it has not accrued any liabilities related to such
obligations in its consolidated financial statements as of
December 31, 2016.</p>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; WHITE-SPACE: normal; WORD-SPACING: 0px; TEXT-TRANSFORM: none; FONT-WEIGHT: normal; COLOR: rgb(0,0,0); FONT-STYLE: normal; ORPHANS: 2; WIDOWS: 2; MARGIN-TOP: 18pt; LETTER-SPACING: normal; TEXT-INDENT: 0px; font-variant-ligatures: normal; font-variant-caps: normal; -webkit-text-stroke-width: 0px">
<b>Legal Proceedings</b></p>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; WHITE-SPACE: normal; WORD-SPACING: 0px; TEXT-TRANSFORM: none; FONT-WEIGHT: normal; COLOR: rgb(0,0,0); FONT-STYLE: normal; ORPHANS: 2; WIDOWS: 2; MARGIN-TOP: 6pt; LETTER-SPACING: normal; TEXT-INDENT: 4%; font-variant-ligatures: normal; font-variant-caps: normal; -webkit-text-stroke-width: 0px">
The Company accrues a liability for legal contingencies when it
believes that it is both probable that a liability has been
incurred and that the Company can reasonably estimate the amount of
the loss. The Company reviews these accruals and adjusts them to
reflect ongoing negotiations, settlements, rulings, advice of legal
counsel and other relevant information. To the extent new
information is obtained and the views on the probable outcomes of
claims, suits, assessments, investigations or legal proceedings
change, changes in the Company’s accrued liabilities would be
recorded in the period in which such determination is made. In
addition, in accordance with the relevant authoritative guidance,
for any matters in which the likelihood of material loss is at
least reasonably possible, the Company will provide disclosure of
the possible loss or range of loss. If a reasonable estimate cannot
be made, however, the Company will provide disclosure to that
effect. The Company expenses legal costs as they are incurred.</p>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; WHITE-SPACE: normal; WORD-SPACING: 0px; TEXT-TRANSFORM: none; FONT-WEIGHT: normal; COLOR: rgb(0,0,0); FONT-STYLE: normal; ORPHANS: 2; WIDOWS: 2; MARGIN-TOP: 12pt; LETTER-SPACING: normal; TEXT-INDENT: 4%; font-variant-ligatures: normal; font-variant-caps: normal; -webkit-text-stroke-width: 0px">
On October 21, 2015, a purported stockholder of the Company
filed a putative class action lawsuit in the U.S. District Court
for the District of Massachusetts, against the Company and Thomas
E. Hughes, captioned Aviad Bessler v. Zafgen, Inc. and Thomas E.
Hughes, <font style="WHITE-SPACE: nowrap"><font style="WHITE-SPACE: nowrap">No. 1:15-cv-13618.</font></font> An
amended complaint was filed on February 22, 2016. The amended
complaint alleges violations of Sections 10(b) and 20(a) of the
Securities Exchange Act of 1934 and SEC Rule <font style="WHITE-SPACE: nowrap">10b-5</font> based on allegedly false and
misleading statements and omissions regarding the Company’s
clinical trials for its drug beloranib. The lawsuit seeks, among
other things, unspecified compensatory damages in connection with
the Company’s allegedly inflated stock price between
June 19, 2014 and October 16, 2015, as a result of those
allegedly false and misleading statements, as well as punitive
damages, interest, attorneys’ fees and costs. On
April 7, 2016, the Company filed a motion to dismiss the
amended complaint. On August 9, 2016, the District Court
granted the motion to dismiss and dismissed the amended complaint
with prejudice. On August 12, 2016, plaintiffs filed a notice
of appeal to the First Circuit Court of Appeals and, on
January 5, 2017, the parties completed briefing in connection
with the appeal. The hearing on the plaintiffs’ appeal was
held on March 7, 2017. The Company is unable to predict the
ultimate outcome of this action and therefore cannot estimate
possible losses or ranges of losses, if any.</p>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; WHITE-SPACE: normal; WORD-SPACING: 0px; TEXT-TRANSFORM: none; FONT-WEIGHT: normal; COLOR: rgb(0,0,0); FONT-STYLE: normal; ORPHANS: 2; WIDOWS: 2; MARGIN-TOP: 12pt; LETTER-SPACING: normal; TEXT-INDENT: 4%; font-variant-ligatures: normal; font-variant-caps: normal; -webkit-text-stroke-width: 0px">
The Company may periodically become subject to other legal
proceedings and claims arising in connection with ongoing business
activities, including claims or disputes related to patents that
have been issued or that are pending in the field of research on
which the Company is focused. Other than the above action, the
Company is not aware of any other material claims as of
December 31, 2016.</p>
</div>
-6000
<div>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-TOP: 18pt">
<b>9. Net Loss Per Share</b></p>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-TOP: 6pt; TEXT-INDENT: 4%">
Basic and diluted net loss per share attributable to common
stockholders was calculated as follows:</p>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 12pt; MARGIN-TOP: 0pt">
 </p>
<table style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; BORDER-COLLAPSE: collapse" cellspacing="0" cellpadding="0" width="100%" align="center" border="0">
<tr>
<td width="64%"></td>
<td valign="bottom" width="6%"></td>
<td></td>
<td></td>
<td></td>
<td valign="bottom" width="6%"></td>
<td></td>
<td></td>
<td></td>
<td valign="bottom" width="6%"></td>
<td></td>
<td></td>
<td></td>
</tr>
<tr style="FONT-SIZE: 8pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid">
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td style="BORDER-BOTTOM: #000000 1pt solid" valign="bottom" colspan="10" align="center"><b>Year
Ended December 31,</b></td>
<td valign="bottom"> </td>
</tr>
<tr style="FONT-SIZE: 8pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid">
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td style="BORDER-BOTTOM: #000000 1pt solid" valign="bottom" colspan="2" align="center"><b>2016</b></td>
<td valign="bottom"> </td>
<td valign="bottom"> </td>
<td style="BORDER-BOTTOM: #000000 1pt solid" valign="bottom" colspan="2" align="center"><b>2015</b></td>
<td valign="bottom"> </td>
<td valign="bottom"> </td>
<td style="BORDER-BOTTOM: #000000 1pt solid" valign="bottom" colspan="2" align="center"><b>2014</b></td>
<td valign="bottom"> </td>
</tr>
<tr style="FONT-SIZE: 8pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid">
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td valign="bottom" colspan="10" align="center"><b>(in thousands,
except per share data)</b></td>
<td valign="bottom"> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid" bgcolor="#CCEEFF">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-LEFT: 1em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Basic and diluted net loss per share attributable to common
stockholders:</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom"> </td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom"> </td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom"></td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-LEFT: 3em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Numerator:</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom"> </td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom"> </td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom"></td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid" bgcolor="#CCEEFF">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-LEFT: 5em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Net loss</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom">$</td>
<td valign="bottom" align="right">(57,878</td>
<td valign="bottom" nowrap="nowrap">) </td>
<td valign="bottom"> </td>
<td valign="bottom">$</td>
<td valign="bottom" align="right">(74,286</td>
<td valign="bottom" nowrap="nowrap">) </td>
<td valign="bottom"> </td>
<td valign="bottom">$</td>
<td valign="bottom" align="right">(36,478</td>
<td valign="bottom" nowrap="nowrap">) </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-LEFT: 5em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Accretion of redeemable convertible preferred stock to redemption
value</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom" nowrap="nowrap" align="right">
—  </td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom"> </td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom" nowrap="nowrap" align="right">
—  </td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom"> </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">(92</td>
<td valign="bottom" nowrap="nowrap">) </td>
</tr>
<tr style="FONT-SIZE: 1px">
<td valign="bottom"></td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
<td valign="bottom"> </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
<td valign="bottom"> </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid" bgcolor="#CCEEFF">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-LEFT: 7em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Net loss attributable to common stockholders</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom">$</td>
<td valign="bottom" align="right">(57,878</td>
<td valign="bottom" nowrap="nowrap">) </td>
<td valign="bottom"> </td>
<td valign="bottom">$</td>
<td valign="bottom" align="right">(74,286</td>
<td valign="bottom" nowrap="nowrap">) </td>
<td valign="bottom"> </td>
<td valign="bottom">$</td>
<td valign="bottom" align="right">(36,570</td>
<td valign="bottom" nowrap="nowrap">) </td>
</tr>
<tr style="FONT-SIZE: 1px">
<td valign="bottom"></td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
<td valign="bottom"> </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
<td valign="bottom"> </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-LEFT: 3em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Denominator:</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom"> </td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom"> </td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom"></td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid" bgcolor="#CCEEFF">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-LEFT: 5em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Weighted average common shares outstanding, basic and diluted</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">27,297,934</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom"> </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">26,756,079</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom"> </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right"> 12,189,155</td>
<td valign="bottom" nowrap="nowrap"> </td>
</tr>
<tr style="FONT-SIZE: 1px">
<td valign="bottom"></td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
<td valign="bottom"> </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
<td valign="bottom"> </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-LEFT: 3em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Net loss per share attributable to common stockholders, basic and
diluted</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom">$</td>
<td valign="bottom" align="right">(2.12</td>
<td valign="bottom" nowrap="nowrap">) </td>
<td valign="bottom"> </td>
<td valign="bottom">$</td>
<td valign="bottom" align="right">(2.78</td>
<td valign="bottom" nowrap="nowrap">) </td>
<td valign="bottom"> </td>
<td valign="bottom">$</td>
<td valign="bottom" align="right">(3.00</td>
<td valign="bottom" nowrap="nowrap">) </td>
</tr>
<tr style="FONT-SIZE: 1px">
<td valign="bottom"></td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
<td valign="bottom"> </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
<td valign="bottom"> </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
</tr>
</table>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-TOP: 12pt; TEXT-INDENT: 4%">
The Company excluded the following common stock equivalents,
outstanding as of December 31, 2016, 2015 and 2014, from the
computation of diluted net loss per share attributable to common
stockholders for the years ended December 31, 2016, 2015 and
2014 because they had an anti-dilutive impact due to the net loss
attributable to common stockholders incurred for the periods:</p>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 12pt; MARGIN-TOP: 0pt">
 </p>
<table style="FONT-SIZE: 8pt; FONT-FAMILY: Times New Roman; BORDER-COLLAPSE: collapse" cellspacing="0" cellpadding="0" width="100%" align="center" border="0">
<tr>
<td width="63%"></td>
<td valign="bottom" width="2%"></td>
<td></td>
<td></td>
<td></td>
<td valign="bottom" width="2%"></td>
<td></td>
<td></td>
<td></td>
<td valign="bottom" width="2%"></td>
<td></td>
<td></td>
<td></td>
</tr>
<tr style="FONT-SIZE: 8pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid">
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td style="BORDER-BOTTOM: #000000 1pt solid" valign="bottom" colspan="10" align="center"><b>As of December 31,</b></td>
<td valign="bottom"> </td>
</tr>
<tr style="FONT-SIZE: 8pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid">
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td style="BORDER-BOTTOM: #000000 1pt solid" valign="bottom" colspan="2" align="center"><b>2016</b></td>
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td style="BORDER-BOTTOM: #000000 1pt solid" valign="bottom" colspan="2" align="center"><b>2015</b></td>
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td style="BORDER-BOTTOM: #000000 1pt solid" valign="bottom" colspan="2" align="center"><b>2014</b></td>
<td valign="bottom"> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid" bgcolor="#CCEEFF">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-LEFT: 1em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Options to purchase common stock</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">
    3,115,003</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">2,555,110</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">  2,008,574</td>
<td valign="bottom" nowrap="nowrap"> </td>
</tr>
<tr style="FONT-SIZE: 1px">
<td valign="bottom"></td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
</tr>
</table>
</div>
0.000
P2Y2M12D
<div>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-TOP: 18pt">
<b>5. Accrued Expenses</b></p>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-TOP: 6pt; TEXT-INDENT: 4%">
Accrued expenses consisted of the following as of December 31,
2016 and 2015:</p>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 12pt; MARGIN-TOP: 0pt">
 </p>
<table style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; BORDER-COLLAPSE: collapse" cellspacing="0" cellpadding="0" width="76%" align="center" border="0">
<tr>
<td width="76%"></td>
<td valign="bottom" width="6%"></td>
<td></td>
<td></td>
<td></td>
<td valign="bottom" width="6%"></td>
<td></td>
<td></td>
<td></td>
</tr>
<tr style="FONT-SIZE: 8pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid">
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td style="BORDER-BOTTOM: #000000 1pt solid" valign="bottom" colspan="6" align="center"><b>December 31,</b></td>
<td valign="bottom"> </td>
</tr>
<tr style="FONT-SIZE: 8pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid">
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td style="BORDER-BOTTOM: #000000 1pt solid" valign="bottom" colspan="2" align="center"><b>2016</b></td>
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td style="BORDER-BOTTOM: #000000 1pt solid" valign="bottom" colspan="2" align="center"><b>2015</b></td>
<td valign="bottom"> </td>
</tr>
<tr style="FONT-SIZE: 8pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid">
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td valign="bottom" colspan="6" align="center"><b>(in
thousands)</b></td>
<td valign="bottom"> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid" bgcolor="#CCEEFF">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-LEFT: 1em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Accrued payroll and related expenses</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom">$</td>
<td valign="bottom" align="right">2,008</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom">$</td>
<td valign="bottom" align="right">1,802</td>
<td valign="bottom" nowrap="nowrap"> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-LEFT: 1em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Accrued research and development expenses</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">892</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">3,727</td>
<td valign="bottom" nowrap="nowrap"> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid" bgcolor="#CCEEFF">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-LEFT: 1em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Accrued restructuring</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">376</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom" nowrap="nowrap" align="right">
—  </td>
<td valign="bottom" nowrap="nowrap"> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-LEFT: 1em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Accrued professional fees</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">347</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">422</td>
<td valign="bottom" nowrap="nowrap"> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid" bgcolor="#CCEEFF">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-LEFT: 1em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Accrued other</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">110</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">161</td>
<td valign="bottom" nowrap="nowrap"> </td>
</tr>
<tr style="FONT-SIZE: 1px">
<td valign="bottom"></td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid">
<td valign="top"></td>
<td valign="bottom">  </td>
<td valign="bottom">$</td>
<td valign="bottom" align="right">3,733</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom">$</td>
<td valign="bottom" align="right">6,112</td>
<td valign="bottom" nowrap="nowrap"> </td>
</tr>
<tr style="FONT-SIZE: 1px">
<td valign="bottom"></td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
</tr>
</table>
</div>
0.340
0.007
0
388000
400000
P5Y
0.081
347000
188600000
1223000
-2254000
<div>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-TOP: 0pt">
<b>4. Property and Equipment, net</b></p>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-TOP: 6pt; TEXT-INDENT: 4%">
Property and equipment, net consisted of the following as of
December 31, 2016 and 2015:</p>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 12pt; MARGIN-TOP: 0pt">
 </p>
<table style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; BORDER-COLLAPSE: collapse" cellspacing="0" cellpadding="0" width="84%" align="center" border="0">
<tr>
<td width="67%"></td>
<td valign="bottom" width="7%"></td>
<td></td>
<td></td>
<td></td>
<td valign="bottom" width="7%"></td>
<td></td>
<td></td>
<td></td>
<td valign="bottom" width="6%"></td>
<td></td>
<td></td>
<td></td>
</tr>
<tr style="FONT-SIZE: 8pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid">
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td valign="bottom" colspan="2"> </td>
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td style="BORDER-BOTTOM: #000000 1pt solid" valign="bottom" colspan="6" align="center"><b>December 31,</b></td>
<td valign="bottom"> </td>
</tr>
<tr style="FONT-SIZE: 8pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid">
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td style="BORDER-BOTTOM: #000000 1pt solid" valign="bottom" colspan="2" align="center"><b>Useful Life</b></td>
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td style="BORDER-BOTTOM: #000000 1pt solid" valign="bottom" colspan="2" align="center"><b>2016</b></td>
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td style="BORDER-BOTTOM: #000000 1pt solid" valign="bottom" colspan="2" align="center"><b>2015</b></td>
<td valign="bottom"> </td>
</tr>
<tr style="FONT-SIZE: 8pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid">
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td valign="bottom" colspan="2"> </td>
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td valign="bottom" colspan="6" align="center"><b>(in
thousands)</b></td>
<td valign="bottom"> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid" bgcolor="#CCEEFF">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-LEFT: 1em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Office equipment</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">5 years</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom">$</td>
<td valign="bottom" align="right">372</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom">$</td>
<td valign="bottom" align="right">359</td>
<td valign="bottom" nowrap="nowrap"> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-LEFT: 1em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Furniture and fixtures</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">5 years</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">194</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">186</td>
<td valign="bottom" nowrap="nowrap"> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid" bgcolor="#CCEEFF">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-LEFT: 1em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Equipment</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">5 years</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom" nowrap="nowrap" align="right">
—  </td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">71</td>
<td valign="bottom" nowrap="nowrap"> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-LEFT: 1em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Leasehold improvements</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">*</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">415</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">406</td>
<td valign="bottom" nowrap="nowrap"> </td>
</tr>
<tr style="FONT-SIZE: 1px">
<td valign="bottom"></td>
<td valign="bottom">  </td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid" bgcolor="#CCEEFF">
<td valign="top"></td>
<td valign="bottom">  </td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">981</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">1,022</td>
<td valign="bottom" nowrap="nowrap"> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-LEFT: 1em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Less: Accumulated depreciation</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">(320</td>
<td valign="bottom" nowrap="nowrap">) </td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">(120</td>
<td valign="bottom" nowrap="nowrap">) </td>
</tr>
<tr style="FONT-SIZE: 1px">
<td valign="bottom"></td>
<td valign="bottom">  </td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid" bgcolor="#CCEEFF">
<td valign="top"></td>
<td valign="bottom">  </td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom">  </td>
<td valign="bottom">$</td>
<td valign="bottom" align="right">661</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom">$</td>
<td valign="bottom" align="right">902</td>
<td valign="bottom" nowrap="nowrap"> </td>
</tr>
<tr style="FONT-SIZE: 1px">
<td valign="bottom"></td>
<td valign="bottom">  </td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
</tr>
</table>
<p style="MARGIN-BOTTOM: 2pt; WIDTH: 10%; BORDER-BOTTOM: #000000 1px solid; MARGIN-TOP: 0pt; LINE-HEIGHT: 8pt">
 </p>
<table style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; BORDER-COLLAPSE: collapse" cellspacing="0" cellpadding="0" width="100%" border="0">
<tr style="PAGE-BREAK-INSIDE: avoid">
<td valign="top" width="2%" align="left">*</td>
<td valign="top" align="left">shorter of asset life or lease
term</td>
</tr>
</table>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-TOP: 12pt; TEXT-INDENT: 4%">
Depreciation expense was $0.2 million, $0.1 million and
less than $0.1 million for the years ended December 31,
2016, 2015 and 2014, respectively.</p>
</div>
<div>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; WHITE-SPACE: normal; WORD-SPACING: 0px; TEXT-TRANSFORM: none; FONT-WEIGHT: normal; COLOR: rgb(0,0,0); FONT-STYLE: normal; ORPHANS: 2; WIDOWS: 2; MARGIN-TOP: 18pt; LETTER-SPACING: normal; TEXT-INDENT: 0px; font-variant-ligatures: normal; font-variant-caps: normal; -webkit-text-stroke-width: 0px">
<b>11. Income Taxes</b></p>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; WHITE-SPACE: normal; WORD-SPACING: 0px; TEXT-TRANSFORM: none; FONT-WEIGHT: normal; COLOR: rgb(0,0,0); FONT-STYLE: normal; ORPHANS: 2; WIDOWS: 2; MARGIN-TOP: 6pt; LETTER-SPACING: normal; TEXT-INDENT: 4%; font-variant-ligatures: normal; font-variant-caps: normal; -webkit-text-stroke-width: 0px">
During the years ended December 31, 2016, 2015 and 2014, the
Company recorded no income tax benefits for the net operating
losses incurred in each year due to its uncertainty of realizing a
benefit from those items.</p>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; WHITE-SPACE: normal; WORD-SPACING: 0px; TEXT-TRANSFORM: none; FONT-WEIGHT: normal; COLOR: rgb(0,0,0); FONT-STYLE: normal; ORPHANS: 2; WIDOWS: 2; MARGIN-TOP: 12pt; LETTER-SPACING: normal; TEXT-INDENT: 4%; font-variant-ligatures: normal; font-variant-caps: normal; -webkit-text-stroke-width: 0px">
The domestic and foreign components of loss before income taxes are
as follows:</p>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 12pt; FONT-FAMILY: "Times New Roman"; WHITE-SPACE: normal; WORD-SPACING: 0px; TEXT-TRANSFORM: none; FONT-WEIGHT: normal; COLOR: rgb(0,0,0); FONT-STYLE: normal; ORPHANS: 2; WIDOWS: 2; MARGIN-TOP: 0pt; LETTER-SPACING: normal; TEXT-INDENT: 0px; font-variant-ligatures: normal; font-variant-caps: normal; -webkit-text-stroke-width: 0px">
 </p>
<table style="FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; WORD-SPACING: 0px; BORDER-COLLAPSE: collapse; TEXT-TRANSFORM: none; ORPHANS: 2; WIDOWS: 2; LETTER-SPACING: normal; TEXT-INDENT: 0px; -webkit-text-stroke-width: 0px" cellspacing="0" cellpadding="0" width="84%" align="center" border="0">
<tr>
<td width="63%"></td>
<td valign="bottom" width="6%"></td>
<td></td>
<td></td>
<td></td>
<td valign="bottom" width="5%"></td>
<td></td>
<td></td>
<td></td>
<td valign="bottom" width="5%"></td>
<td></td>
<td></td>
<td></td>
</tr>
<tr style="FONT-SIZE: 8pt; FONT-FAMILY: "Times New Roman"; break-inside: avoid">
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td style="BORDER-BOTTOM: rgb(0,0,0) 1pt solid" valign="bottom" colspan="2" align="center"><b>2016</b></td>
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td style="BORDER-BOTTOM: rgb(0,0,0) 1pt solid" valign="bottom" colspan="2" align="center"><b>2015</b></td>
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td style="BORDER-BOTTOM: rgb(0,0,0) 1pt solid" valign="bottom" colspan="2" align="center"><b>2014</b></td>
<td valign="bottom"> </td>
</tr>
<tr style="FONT-SIZE: 8pt; FONT-FAMILY: "Times New Roman"; break-inside: avoid">
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td valign="bottom" colspan="10" align="center"><b>(in
thousands)</b></td>
<td valign="bottom"> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; break-inside: avoid" bgcolor="#CCEEFF">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; MARGIN-LEFT: 1em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Domestic</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom">$</td>
<td valign="bottom" align="right">(57,799</td>
<td valign="bottom" nowrap="nowrap">) </td>
<td valign="bottom">  </td>
<td valign="bottom">$</td>
<td valign="bottom" align="right">(72,147</td>
<td valign="bottom" nowrap="nowrap">) </td>
<td valign="bottom">  </td>
<td valign="bottom">$</td>
<td valign="bottom" align="right">(35,818</td>
<td valign="bottom" nowrap="nowrap">) </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; break-inside: avoid">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; MARGIN-LEFT: 1em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Foreign</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">(79</td>
<td valign="bottom" nowrap="nowrap">) </td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">(2,139</td>
<td valign="bottom" nowrap="nowrap">) </td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">(660</td>
<td valign="bottom" nowrap="nowrap">) </td>
</tr>
<tr style="FONT-SIZE: 1px">
<td valign="bottom"></td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; break-inside: avoid" bgcolor="#CCEEFF">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; MARGIN-LEFT: 1em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Loss before income taxes</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom">$</td>
<td valign="bottom" align="right">(57,878</td>
<td valign="bottom" nowrap="nowrap">) </td>
<td valign="bottom">  </td>
<td valign="bottom">$</td>
<td valign="bottom" align="right">(74,286</td>
<td valign="bottom" nowrap="nowrap">) </td>
<td valign="bottom">  </td>
<td valign="bottom">$</td>
<td valign="bottom" align="right">(36,478</td>
<td valign="bottom" nowrap="nowrap">) </td>
</tr>
<tr style="FONT-SIZE: 1px">
<td valign="bottom"></td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
</tr>
</table>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; WHITE-SPACE: normal; WORD-SPACING: 0px; TEXT-TRANSFORM: none; FONT-WEIGHT: normal; COLOR: rgb(0,0,0); FONT-STYLE: normal; ORPHANS: 2; WIDOWS: 2; MARGIN-TOP: 12pt; LETTER-SPACING: normal; TEXT-INDENT: 4%; font-variant-ligatures: normal; font-variant-caps: normal; -webkit-text-stroke-width: 0px">
A reconciliation of the U.S. federal statutory income tax rate to
the Company’s effective income tax rate is as follows:</p>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 12pt; FONT-FAMILY: "Times New Roman"; WHITE-SPACE: normal; WORD-SPACING: 0px; TEXT-TRANSFORM: none; FONT-WEIGHT: normal; COLOR: rgb(0,0,0); FONT-STYLE: normal; ORPHANS: 2; WIDOWS: 2; MARGIN-TOP: 0pt; LETTER-SPACING: normal; TEXT-INDENT: 0px; font-variant-ligatures: normal; font-variant-caps: normal; -webkit-text-stroke-width: 0px">
 </p>
<table style="FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; WORD-SPACING: 0px; BORDER-COLLAPSE: collapse; TEXT-TRANSFORM: none; ORPHANS: 2; WIDOWS: 2; LETTER-SPACING: normal; TEXT-INDENT: 0px; -webkit-text-stroke-width: 0px" cellspacing="0" cellpadding="0" width="84%" align="center" border="0">
<tr>
<td width="75%"></td>
<td valign="bottom" width="6%"></td>
<td></td>
<td></td>
<td></td>
<td valign="bottom" width="5%"></td>
<td></td>
<td></td>
<td></td>
<td valign="bottom" width="5%"></td>
<td></td>
<td></td>
<td></td>
</tr>
<tr style="FONT-SIZE: 8pt; FONT-FAMILY: "Times New Roman"; break-inside: avoid">
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td style="BORDER-BOTTOM: rgb(0,0,0) 1pt solid" valign="bottom" colspan="10" align="center"><b>Year Ended
December 31,</b></td>
<td valign="bottom"> </td>
</tr>
<tr style="FONT-SIZE: 8pt; FONT-FAMILY: "Times New Roman"; break-inside: avoid">
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td style="BORDER-BOTTOM: rgb(0,0,0) 1pt solid" valign="bottom" colspan="2" align="center"><b>2016</b></td>
<td valign="bottom"> </td>
<td valign="bottom"> </td>
<td style="BORDER-BOTTOM: rgb(0,0,0) 1pt solid" valign="bottom" colspan="2" align="center"><b>2015</b></td>
<td valign="bottom"> </td>
<td valign="bottom"> </td>
<td style="BORDER-BOTTOM: rgb(0,0,0) 1pt solid" valign="bottom" colspan="2" align="center"><b>2014</b></td>
<td valign="bottom"> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; break-inside: avoid" bgcolor="#CCEEFF">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; MARGIN-LEFT: 1em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Federal statutory income tax rate</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">(34.0</td>
<td valign="bottom" nowrap="nowrap">%) </td>
<td valign="bottom"> </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">(34.0</td>
<td valign="bottom" nowrap="nowrap">%) </td>
<td valign="bottom"> </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">(34.0</td>
<td valign="bottom" nowrap="nowrap">%) </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; break-inside: avoid">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; MARGIN-LEFT: 3em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Federal and state research and development tax credit</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">(2.9</td>
<td valign="bottom" nowrap="nowrap">) </td>
<td valign="bottom"> </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">(3.9</td>
<td valign="bottom" nowrap="nowrap">) </td>
<td valign="bottom"> </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">(1.9</td>
<td valign="bottom" nowrap="nowrap">) </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; break-inside: avoid" bgcolor="#CCEEFF">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; MARGIN-LEFT: 3em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
State taxes, net of federal benefit</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">(3.9</td>
<td valign="bottom" nowrap="nowrap">) </td>
<td valign="bottom"> </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">(3.9</td>
<td valign="bottom" nowrap="nowrap">) </td>
<td valign="bottom"> </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">(4.0</td>
<td valign="bottom" nowrap="nowrap">) </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; break-inside: avoid">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; MARGIN-LEFT: 3em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Orphan drug tax credit</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">(1.3</td>
<td valign="bottom" nowrap="nowrap">) </td>
<td valign="bottom"> </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">(3.5</td>
<td valign="bottom" nowrap="nowrap">) </td>
<td valign="bottom"> </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">(3.2</td>
<td valign="bottom" nowrap="nowrap">) </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; break-inside: avoid" bgcolor="#CCEEFF">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; MARGIN-LEFT: 3em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Stock compensation expense</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">0.7</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom"> </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">0.9</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom"> </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">0.6</td>
<td valign="bottom" nowrap="nowrap"> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; break-inside: avoid">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; MARGIN-LEFT: 3em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Nondeductible Australia research and development expenses</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">0.0</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom"> </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">1.0</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom"> </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">0.6</td>
<td valign="bottom" nowrap="nowrap"> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; break-inside: avoid" bgcolor="#CCEEFF">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; MARGIN-LEFT: 3em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Other items</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">1.3</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom"> </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">0.1</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom"> </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">2.4</td>
<td valign="bottom" nowrap="nowrap"> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; break-inside: avoid">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; MARGIN-LEFT: 3em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Change in deferred tax asset valuation allowance</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">40.1</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom"> </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">43.3</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom"> </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">39.5</td>
<td valign="bottom" nowrap="nowrap"> </td>
</tr>
<tr style="FONT-SIZE: 1px">
<td valign="bottom"></td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
<td valign="bottom"> </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
<td valign="bottom"> </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; break-inside: avoid" bgcolor="#CCEEFF">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; MARGIN-LEFT: 1em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Effective income tax rate</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">0.0</td>
<td valign="bottom" nowrap="nowrap">% </td>
<td valign="bottom"> </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">0.0</td>
<td valign="bottom" nowrap="nowrap">% </td>
<td valign="bottom"> </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">0.0</td>
<td valign="bottom" nowrap="nowrap">% </td>
</tr>
<tr style="FONT-SIZE: 1px">
<td valign="bottom"></td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
<td valign="bottom"> </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
<td valign="bottom"> </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
</tr>
</table>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; WHITE-SPACE: normal; WORD-SPACING: 0px; TEXT-TRANSFORM: none; FONT-WEIGHT: normal; COLOR: rgb(0,0,0); FONT-STYLE: normal; ORPHANS: 2; WIDOWS: 2; MARGIN-TOP: 12pt; LETTER-SPACING: normal; TEXT-INDENT: 4%; font-variant-ligatures: normal; font-variant-caps: normal; -webkit-text-stroke-width: 0px">
Net deferred tax assets as of December 31, 2016 and 2015
consisted of the following:</p>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 12pt; FONT-FAMILY: "Times New Roman"; WHITE-SPACE: normal; WORD-SPACING: 0px; TEXT-TRANSFORM: none; FONT-WEIGHT: normal; COLOR: rgb(0,0,0); FONT-STYLE: normal; ORPHANS: 2; WIDOWS: 2; MARGIN-TOP: 0pt; LETTER-SPACING: normal; TEXT-INDENT: 0px; font-variant-ligatures: normal; font-variant-caps: normal; -webkit-text-stroke-width: 0px">
 </p>
<table style="FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; WORD-SPACING: 0px; BORDER-COLLAPSE: collapse; TEXT-TRANSFORM: none; ORPHANS: 2; WIDOWS: 2; LETTER-SPACING: normal; TEXT-INDENT: 0px; -webkit-text-stroke-width: 0px" cellspacing="0" cellpadding="0" width="76%" align="center" border="0">
<tr>
<td width="71%"></td>
<td valign="bottom" width="12%"></td>
<td></td>
<td></td>
<td></td>
<td valign="bottom" width="11%"></td>
<td></td>
<td></td>
<td></td>
</tr>
<tr style="FONT-SIZE: 8pt; FONT-FAMILY: "Times New Roman"; break-inside: avoid">
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td style="BORDER-BOTTOM: rgb(0,0,0) 1pt solid" valign="bottom" colspan="6" align="center"><b>December 31,</b></td>
<td valign="bottom"> </td>
</tr>
<tr style="FONT-SIZE: 8pt; FONT-FAMILY: "Times New Roman"; break-inside: avoid">
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td style="BORDER-BOTTOM: rgb(0,0,0) 1pt solid" valign="bottom" colspan="2" align="center"><b>2016</b></td>
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td style="BORDER-BOTTOM: rgb(0,0,0) 1pt solid" valign="bottom" colspan="2" align="center"><b>2015</b></td>
<td valign="bottom"> </td>
</tr>
<tr style="FONT-SIZE: 8pt; FONT-FAMILY: "Times New Roman"; break-inside: avoid">
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td valign="bottom" colspan="6" align="center"><b>(in
thousands)</b></td>
<td valign="bottom"> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; break-inside: avoid" bgcolor="#CCEEFF">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; MARGIN-LEFT: 1em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Noncurrent deferred tax assets:</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom">  </td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom"></td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; break-inside: avoid">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; MARGIN-LEFT: 3em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Capitalized research and development expenses</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">59,489</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">46,568</td>
<td valign="bottom" nowrap="nowrap"> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; break-inside: avoid" bgcolor="#CCEEFF">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; MARGIN-LEFT: 3em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Net operating loss carryforwards</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">14,991</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">11,186</td>
<td valign="bottom" nowrap="nowrap"> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; break-inside: avoid">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; MARGIN-LEFT: 3em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Tax credit carryforwards</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">14,297</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">11,570</td>
<td valign="bottom" nowrap="nowrap"> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; break-inside: avoid" bgcolor="#CCEEFF">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; MARGIN-LEFT: 3em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Capitalized legal expenses</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">2,119</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">1,773</td>
<td valign="bottom" nowrap="nowrap"> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; break-inside: avoid">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; MARGIN-LEFT: 3em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Stock-based compensation</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">6,027</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">2,780</td>
<td valign="bottom" nowrap="nowrap"> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; break-inside: avoid" bgcolor="#CCEEFF">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; MARGIN-LEFT: 3em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Accrued expenses</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">783</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">648</td>
<td valign="bottom" nowrap="nowrap"> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; break-inside: avoid">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; MARGIN-LEFT: 3em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Other temporary differences</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">14</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">16</td>
<td valign="bottom" nowrap="nowrap"> </td>
</tr>
<tr style="FONT-SIZE: 1px">
<td valign="bottom"></td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; break-inside: avoid" bgcolor="#CCEEFF">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; MARGIN-LEFT: 5em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Total noncurrent deferred tax assets</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">97,720</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">74,541</td>
<td valign="bottom" nowrap="nowrap"> </td>
</tr>
<tr style="FONT-SIZE: 1px">
<td valign="bottom"></td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; break-inside: avoid">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; MARGIN-LEFT: 5em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Total gross deferred tax assets</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">97,720</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">74,541</td>
<td valign="bottom" nowrap="nowrap"> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; break-inside: avoid" bgcolor="#CCEEFF">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; MARGIN-LEFT: 3em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Valuation allowance</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">(97,720</td>
<td valign="bottom" nowrap="nowrap">) </td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">(74,541</td>
<td valign="bottom" nowrap="nowrap">) </td>
</tr>
<tr style="FONT-SIZE: 1px">
<td valign="bottom"></td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; break-inside: avoid">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; MARGIN-LEFT: 5em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Net deferred tax assets</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom" nowrap="nowrap">$</td>
<td valign="bottom" nowrap="nowrap" align="right">
—  </td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom" nowrap="nowrap">$</td>
<td valign="bottom" nowrap="nowrap" align="right">
—  </td>
<td valign="bottom" nowrap="nowrap"> </td>
</tr>
<tr style="FONT-SIZE: 1px">
<td valign="bottom"></td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
</tr>
</table>
<p style="MARGIN-BOTTOM: 0px; FONT-SIZE: 1px; FONT-FAMILY: "Times New Roman"; WHITE-SPACE: normal; WORD-SPACING: 0px; TEXT-TRANSFORM: none; FONT-WEIGHT: normal; COLOR: rgb(0,0,0); FONT-STYLE: normal; ORPHANS: 2; WIDOWS: 2; MARGIN-TOP: 12px; LETTER-SPACING: normal; TEXT-INDENT: 0px; font-variant-ligatures: normal; font-variant-caps: normal; -webkit-text-stroke-width: 0px">
 </p>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; WHITE-SPACE: normal; WORD-SPACING: 0px; TEXT-TRANSFORM: none; FONT-WEIGHT: normal; COLOR: rgb(0,0,0); FONT-STYLE: normal; ORPHANS: 2; WIDOWS: 2; MARGIN-TOP: 0pt; LETTER-SPACING: normal; TEXT-INDENT: 4%; font-variant-ligatures: normal; font-variant-caps: normal; -webkit-text-stroke-width: 0px">
Changes in the valuation allowance for deferred tax assets during
the years ended December 31, 2016, 2015 and 2014 related
primarily to the increase in net operating loss carryforwards,
capitalized research and development expenses and tax credit
carryforwards and were as follows:</p>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 12pt; FONT-FAMILY: "Times New Roman"; WHITE-SPACE: normal; WORD-SPACING: 0px; TEXT-TRANSFORM: none; FONT-WEIGHT: normal; COLOR: rgb(0,0,0); FONT-STYLE: normal; ORPHANS: 2; WIDOWS: 2; MARGIN-TOP: 0pt; LETTER-SPACING: normal; TEXT-INDENT: 0px; font-variant-ligatures: normal; font-variant-caps: normal; -webkit-text-stroke-width: 0px">
 </p>
<table style="FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; WORD-SPACING: 0px; BORDER-COLLAPSE: collapse; TEXT-TRANSFORM: none; ORPHANS: 2; WIDOWS: 2; LETTER-SPACING: normal; TEXT-INDENT: 0px; -webkit-text-stroke-width: 0px" cellspacing="0" cellpadding="0" width="92%" align="center" border="0">
<tr>
<td width="70%"></td>
<td valign="bottom" width="4%"></td>
<td></td>
<td></td>
<td></td>
<td valign="bottom" width="4%"></td>
<td></td>
<td></td>
<td></td>
<td valign="bottom" width="4%"></td>
<td></td>
<td></td>
<td></td>
</tr>
<tr style="FONT-SIZE: 8pt; FONT-FAMILY: "Times New Roman"; break-inside: avoid">
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td style="BORDER-BOTTOM: rgb(0,0,0) 1pt solid" valign="bottom" colspan="10" align="center"><b>Year Ended
December 31,</b></td>
<td valign="bottom"> </td>
</tr>
<tr style="FONT-SIZE: 8pt; FONT-FAMILY: "Times New Roman"; break-inside: avoid">
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td style="BORDER-BOTTOM: rgb(0,0,0) 1pt solid" valign="bottom" colspan="2" align="center"><b>2016</b></td>
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td style="BORDER-BOTTOM: rgb(0,0,0) 1pt solid" valign="bottom" colspan="2" align="center"><b>2015</b></td>
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td style="BORDER-BOTTOM: rgb(0,0,0) 1pt solid" valign="bottom" colspan="2" align="center"><b>2014</b></td>
<td valign="bottom"> </td>
</tr>
<tr style="FONT-SIZE: 8pt; FONT-FAMILY: "Times New Roman"; break-inside: avoid">
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td valign="bottom" colspan="10" align="center"><b>(in
thousands)</b></td>
<td valign="bottom"> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; break-inside: avoid" bgcolor="#CCEEFF">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; MARGIN-LEFT: 1em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Valuation allowance as of beginning of year</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom">$</td>
<td valign="bottom" align="right">74,541</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom">$</td>
<td valign="bottom" align="right">42,398</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom">$</td>
<td valign="bottom" align="right">27,831</td>
<td valign="bottom" nowrap="nowrap"> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; break-inside: avoid">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; MARGIN-LEFT: 3em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Decreases recorded as benefit to income tax provision</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom" nowrap="nowrap" align="right">
—  </td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom" nowrap="nowrap" align="right">
—  </td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom" nowrap="nowrap" align="right">
—  </td>
<td valign="bottom" nowrap="nowrap"> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; break-inside: avoid" bgcolor="#CCEEFF">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; MARGIN-LEFT: 3em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Increases recorded to income tax provision</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">23,179</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">32,143</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">14,567</td>
<td valign="bottom" nowrap="nowrap"> </td>
</tr>
<tr style="FONT-SIZE: 1px">
<td valign="bottom"></td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; break-inside: avoid">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; MARGIN-LEFT: 1em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Valuation allowance as of end of year</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom">$</td>
<td valign="bottom" align="right">97,720</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom">$</td>
<td valign="bottom" align="right">74,541</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom">$</td>
<td valign="bottom" align="right">42,398</td>
<td valign="bottom" nowrap="nowrap"> </td>
</tr>
<tr style="FONT-SIZE: 1px">
<td valign="bottom"></td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
</tr>
</table>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; WHITE-SPACE: normal; WORD-SPACING: 0px; TEXT-TRANSFORM: none; FONT-WEIGHT: normal; COLOR: rgb(0,0,0); FONT-STYLE: normal; ORPHANS: 2; WIDOWS: 2; MARGIN-TOP: 12pt; LETTER-SPACING: normal; TEXT-INDENT: 4%; font-variant-ligatures: normal; font-variant-caps: normal; -webkit-text-stroke-width: 0px">
As of December 31, 2016, the Company had net operating loss
carryforwards for federal and state income tax purposes of
$49.1 million and $35.9 million, respectively, which
begin to expire in 2026 and 2030, respectively. As of
December 31, 2016, the Company did not record deferred tax
assets of $12.8 million (gross) that were attributable to
stock option exercises which will be recorded as an increase in
additional paid in capital once they are realized in accordance
with accounting for stock-based compensation awards. These
deductions are not reflected in the federal and state net operating
loss carryforwards and the capitalized research and development
expense deferred tax assets in the amounts of $9.4 million,
$7.2 million, and $3.4 million, respectively. As of
December 31, 2016, the Company also had available tax credit
carryforwards for federal and state income tax purposes of
$13.1 million and $1.9 million, respectively, which begin
to expire in 2026 and 2021, respectively. Utilization of the net
operating loss carryforwards and tax credit carryforwards may be
subject to a substantial annual limitation under Section 382
of the Internal Revenue Code of 1986 due to ownership changes that
have occurred previously or that could occur in the future. These
ownership changes may limit the amount of carryforwards that can be
utilized annually to offset future taxable income.</p>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; WHITE-SPACE: normal; WORD-SPACING: 0px; TEXT-TRANSFORM: none; FONT-WEIGHT: normal; COLOR: rgb(0,0,0); FONT-STYLE: normal; ORPHANS: 2; WIDOWS: 2; MARGIN-TOP: 12pt; LETTER-SPACING: normal; TEXT-INDENT: 4%; font-variant-ligatures: normal; font-variant-caps: normal; -webkit-text-stroke-width: 0px">
In general, an ownership change, as defined by Section 382,
results from transactions increasing the ownership of certain
stockholders or public groups in the stock of a corporation by more
than 50% over a three-year period. The Company has not conducted a
study to assess whether a change of control has occurred or whether
there have been multiple changes of control since inception due to
the significant complexity and cost associated with such a study.
If the Company has experienced a change of control, as defined by
Section 382, at any time since inception, utilization of the
net operating loss carryforwards or tax credit carryforwards would
be subject to an annual limitation under Section 382, which is
determined by first multiplying the value of the Company’s
stock at the time of the ownership change by the applicable
long-term <font style="WHITE-SPACE: nowrap">tax-exempt</font> rate, and then could be
subject to additional adjustments, as required. Any limitation may
result in expiration of a portion of the net operating loss
carryforwards or tax credit carryforwards before utilization.
Further, until a study is completed and any limitation is known, no
amounts are being presented as an uncertain tax position.</p>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; WHITE-SPACE: normal; WORD-SPACING: 0px; TEXT-TRANSFORM: none; FONT-WEIGHT: normal; COLOR: rgb(0,0,0); FONT-STYLE: normal; ORPHANS: 2; WIDOWS: 2; MARGIN-TOP: 12pt; LETTER-SPACING: normal; TEXT-INDENT: 4%; font-variant-ligatures: normal; font-variant-caps: normal; -webkit-text-stroke-width: 0px">
As of December 31, 2016 and 2015, the Company’s gross
deferred tax asset balance of $97.7 million and
$74.5 million, respectively, was comprised principally of net
operating loss carryforwards, capitalized research and development
expenses and tax credit carryforwards. During the years ended
December 31, 2016, 2015 and 2014, gross deferred tax assets
increased due to additional net operating loss carryforwards,
research and development tax credits generated and additional
research and development expenses capitalized for tax purposes.</p>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; WHITE-SPACE: normal; WORD-SPACING: 0px; TEXT-TRANSFORM: none; FONT-WEIGHT: normal; COLOR: rgb(0,0,0); FONT-STYLE: normal; ORPHANS: 2; WIDOWS: 2; MARGIN-TOP: 12pt; LETTER-SPACING: normal; TEXT-INDENT: 4%; font-variant-ligatures: normal; font-variant-caps: normal; -webkit-text-stroke-width: 0px">
The Company has evaluated the positive and negative evidence
bearing upon its ability to realize the deferred tax assets.
Management has considered the Company’s history of cumulative
net losses incurred since inception and its lack of
commercialization of any products or generation of any revenue from
product sales since inception and has concluded that it is more
likely than not that the Company will not realize the benefits of
the deferred tax assets. Accordingly, a full valuation allowance
has been established against the deferred tax assets as of
December 31, 2016 and 2015. Management reevaluates the
positive and negative evidence at each reporting period.</p>
<p style="MARGIN-BOTTOM: 0px; FONT-SIZE: 1px; FONT-FAMILY: "Times New Roman"; WHITE-SPACE: normal; WORD-SPACING: 0px; TEXT-TRANSFORM: none; FONT-WEIGHT: normal; COLOR: rgb(0,0,0); FONT-STYLE: normal; ORPHANS: 2; WIDOWS: 2; MARGIN-TOP: 12px; LETTER-SPACING: normal; TEXT-INDENT: 0px; font-variant-ligatures: normal; font-variant-caps: normal; -webkit-text-stroke-width: 0px">
 </p>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; WHITE-SPACE: normal; WORD-SPACING: 0px; TEXT-TRANSFORM: none; FONT-WEIGHT: normal; COLOR: rgb(0,0,0); FONT-STYLE: normal; ORPHANS: 2; WIDOWS: 2; MARGIN-TOP: 0pt; LETTER-SPACING: normal; TEXT-INDENT: 4%; font-variant-ligatures: normal; font-variant-caps: normal; -webkit-text-stroke-width: 0px">
The Company has not recorded any amounts for unrecognized tax
benefits as of December 31, 2016 or 2015.</p>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; WHITE-SPACE: normal; WORD-SPACING: 0px; TEXT-TRANSFORM: none; FONT-WEIGHT: normal; COLOR: rgb(0,0,0); FONT-STYLE: normal; ORPHANS: 2; WIDOWS: 2; MARGIN-TOP: 12pt; LETTER-SPACING: normal; TEXT-INDENT: 4%; font-variant-ligatures: normal; font-variant-caps: normal; -webkit-text-stroke-width: 0px">
The Company files tax returns as prescribed by the tax laws of the
jurisdictions in which it operates. In the normal course of
business, the Company is subject to examination by federal and
state jurisdictions, where applicable. There are currently no
pending income tax examinations. The Company’s tax years are
still open under statute from 2013 to the present for federal
income tax purposes and from 2012 to the present for state
purposes. Earlier years may be examined to the extent that tax
credit or net operating loss carryforwards are used in future
periods. The Company’s policy is to record interest and
penalties related to income taxes as part of its income tax
provision.</p>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; WHITE-SPACE: normal; WORD-SPACING: 0px; TEXT-TRANSFORM: none; FONT-WEIGHT: normal; COLOR: rgb(0,0,0); FONT-STYLE: normal; ORPHANS: 2; WIDOWS: 2; MARGIN-TOP: 12pt; LETTER-SPACING: normal; TEXT-INDENT: 4%; font-variant-ligatures: normal; font-variant-caps: normal; -webkit-text-stroke-width: 0px">
The Company considers only the direct effects of windfall tax
deductions.</p>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; WHITE-SPACE: normal; WORD-SPACING: 0px; TEXT-TRANSFORM: none; FONT-WEIGHT: normal; COLOR: rgb(0,0,0); FONT-STYLE: normal; ORPHANS: 2; WIDOWS: 2; MARGIN-TOP: 12pt; LETTER-SPACING: normal; TEXT-INDENT: 4%; font-variant-ligatures: normal; font-variant-caps: normal; -webkit-text-stroke-width: 0px">
The deferred tax assets above exclude $9.4 million and
$7.2 million of gross ($3.2 million and $0.4 million
tax effected) federal and state net operating losses, respectively,
and $3.4 million of gross ($1.3 million tax effected)
capitalized research and development related to tax deductions from
the exercise of stock options subsequent to the adoption of the
2006 accounting standard on stock-based compensation. This amount
represents an excess tax benefit and has not been included in the
gross deferred tax assets. The Company will adopt ASU <font style="WHITE-SPACE: nowrap">No. 2016-09,</font> <i>Improvements to Employee
Share-Based Payment Accounting</i>, for the quarter ended
March 31, 2017. As a result of adoption, the deferred tax
assets associated federal and state net operating losses will
increase by $9.4 million and $7.2 million gross
($3.2 million and $0.4 million tax effected),
respectively, and capitalized research and development will
increase by $3.4 million gross ($1.3 million tax
effected). These amounts will be offset by a corresponding increase
in the valuation allowance. The adoption of ASU <font style="WHITE-SPACE: nowrap">No. 2016-09</font> will have no impact on the
Company’s consolidated financial statements.</p>
</div>
-328000
127000
220000
58225000
-57878000
-57878000
529000
51447000
127000
<div>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-TOP: 18pt">
<b>Patent Costs</b></p>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-TOP: 6pt; TEXT-INDENT: 4%">
All patent-related costs incurred in connection with filing and
prosecuting patent applications are recorded as general and
administrative expenses as incurred, as recoverability of such
expenditures is uncertain.</p>
</div>
136528000
<div>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-TOP: 6pt; TEXT-INDENT: 4%">
Property and equipment, net consisted of the following as of
December 31, 2016 and 2015:</p>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 12pt; MARGIN-TOP: 0pt">
 </p>
<table style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; BORDER-COLLAPSE: collapse" cellspacing="0" cellpadding="0" width="84%" align="center" border="0">
<tr>
<td width="67%"></td>
<td valign="bottom" width="7%"></td>
<td></td>
<td></td>
<td></td>
<td valign="bottom" width="7%"></td>
<td></td>
<td></td>
<td></td>
<td valign="bottom" width="6%"></td>
<td></td>
<td></td>
<td></td>
</tr>
<tr style="FONT-SIZE: 8pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid">
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td valign="bottom" colspan="2"> </td>
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td style="BORDER-BOTTOM: #000000 1pt solid" valign="bottom" colspan="6" align="center"><b>December 31,</b></td>
<td valign="bottom"> </td>
</tr>
<tr style="FONT-SIZE: 8pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid">
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td style="BORDER-BOTTOM: #000000 1pt solid" valign="bottom" colspan="2" align="center"><b>Useful Life</b></td>
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td style="BORDER-BOTTOM: #000000 1pt solid" valign="bottom" colspan="2" align="center"><b>2016</b></td>
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td style="BORDER-BOTTOM: #000000 1pt solid" valign="bottom" colspan="2" align="center"><b>2015</b></td>
<td valign="bottom"> </td>
</tr>
<tr style="FONT-SIZE: 8pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid">
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td valign="bottom" colspan="2"> </td>
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td valign="bottom" colspan="6" align="center"><b>(in
thousands)</b></td>
<td valign="bottom"> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid" bgcolor="#CCEEFF">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-LEFT: 1em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Office equipment</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">5 years</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom">$</td>
<td valign="bottom" align="right">372</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom">$</td>
<td valign="bottom" align="right">359</td>
<td valign="bottom" nowrap="nowrap"> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-LEFT: 1em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Furniture and fixtures</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">5 years</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">194</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">186</td>
<td valign="bottom" nowrap="nowrap"> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid" bgcolor="#CCEEFF">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-LEFT: 1em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Equipment</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">5 years</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom" nowrap="nowrap" align="right">
—  </td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">71</td>
<td valign="bottom" nowrap="nowrap"> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-LEFT: 1em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Leasehold improvements</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">*</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">415</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">406</td>
<td valign="bottom" nowrap="nowrap"> </td>
</tr>
<tr style="FONT-SIZE: 1px">
<td valign="bottom"></td>
<td valign="bottom">  </td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid" bgcolor="#CCEEFF">
<td valign="top"></td>
<td valign="bottom">  </td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">981</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">1,022</td>
<td valign="bottom" nowrap="nowrap"> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-LEFT: 1em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Less: Accumulated depreciation</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">(320</td>
<td valign="bottom" nowrap="nowrap">) </td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">(120</td>
<td valign="bottom" nowrap="nowrap">) </td>
</tr>
<tr style="FONT-SIZE: 1px">
<td valign="bottom"></td>
<td valign="bottom">  </td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid" bgcolor="#CCEEFF">
<td valign="top"></td>
<td valign="bottom">  </td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom">  </td>
<td valign="bottom">$</td>
<td valign="bottom" align="right">661</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom">$</td>
<td valign="bottom" align="right">902</td>
<td valign="bottom" nowrap="nowrap"> </td>
</tr>
<tr style="FONT-SIZE: 1px">
<td valign="bottom"></td>
<td valign="bottom">  </td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
</tr>
</table>
<p style="MARGIN-BOTTOM: 2pt; WIDTH: 10%; BORDER-BOTTOM: #000000 1px solid; MARGIN-TOP: 0pt; LINE-HEIGHT: 8pt">
 </p>
<table style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; BORDER-COLLAPSE: collapse" cellspacing="0" cellpadding="0" width="100%" border="0">
<tr style="PAGE-BREAK-INSIDE: avoid">
<td valign="top" width="2%" align="left">*</td>
<td valign="top" align="left">shorter of asset life or lease
term</td>
</tr>
</table>
</div>
2017-12-01
0
<div>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-TOP: 18pt">
<b>Impairment of Long-Lived Assets</b></p>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-TOP: 6pt; TEXT-INDENT: 4%">
Long-lived assets consist of property and equipment. Long-lived
assets to be held and used are tested for recoverability whenever
events or changes in business circumstances indicate that the
carrying amount of the assets may not be fully recoverable. Factors
that the Company considers in deciding when to perform an
impairment review include significant underperformance of the
business in relation to expectations, significant negative industry
or economic trends, and significant changes or planned changes in
the use of the assets. If an impairment review is performed to
evaluate a long-lived asset for recoverability, the Company
compares forecasts of undiscounted cash flows expected to result
from the use and eventual disposition of the long-lived asset to
its carrying value. An impairment loss would be recognized when
estimated undiscounted future cash flows expected to result from
the use of an asset are less than its carrying amount. The
impairment loss would be based on the excess of the carrying value
of the impaired asset over its fair value, determined based on
discounted cash flows. To date, the Company has not recorded any
impairment losses on long-lived assets.</p>
</div>
-57799000
-79000
-4625000
-413000
<div>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-TOP: 18pt">
<b>Reclassifications</b></p>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-TOP: 6pt; TEXT-INDENT: 4%">
Prior period financial statement amounts have been reclassified to
conform to current period presentation.</p>
</div>
-57878000
<div>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-TOP: 18pt">
<b>Recently Issued and Adopted Accounting Pronouncements</b></p>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-TOP: 6pt; TEXT-INDENT: 4%">
In May 2014, the Financial Accounting Standards Board (the
“FASB”) issued ASU <font style="WHITE-SPACE: nowrap">No. 2014-09,</font> <i>Revenue from
Contracts with Customers</i> (Topic 606), which supersedes all
existing revenue recognition requirements, including most
industry-specific guidance. The new standard requires a company to
recognize revenue when it transfers goods or services to customers
in an amount that reflects the consideration that the company
expects to receive for those goods or services. The FASB has
continued to issue accounting standards updates to clarify and
provide implementation guidance related to Revenue from Contracts
with Customers, including ASU <font style="WHITE-SPACE: nowrap">2016-08</font><i>, Revenue from Contract with
Customers: Principal versus Agent Considerations</i>, ASU
<font style="WHITE-SPACE: nowrap">2016-10,</font> <i>Revenue from
Contracts with Customers: Identifying Performance Obligations and
Licensing</i>, and ASU <font style="WHITE-SPACE: nowrap">2016-12,</font> <i>Revenue from Contracts
with Customers: Narrow-Scope Improvements and Practical
Expedients.</i> These amendments address a number of areas,
including the entity’s identification of its performance
obligations in a contract, collectability, <font style="WHITE-SPACE: nowrap">non-cash</font> consideration, presentation
of sales tax and an entity’s evaluation of the nature of its
promise to grant a license of intellectual property and whether or
not that revenue is recognized over time or at a point in time.
These new standards will be effective for the Company beginning
January 1, 2018. The Company could early adopt the standard
for the year ending December 31, 2017. The Company plans to
early adopt the standard as of January 1, 2017, although there
is no impact of this new guidance on its consolidated financial
statements as it does not currently have any revenue generating
arrangements.</p>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-TOP: 12pt; TEXT-INDENT: 4%">
In August 2014, the FASB issued ASU <font style="WHITE-SPACE: nowrap">No. 2014-15,</font> <i>Presentation of
Financial Statements—Going Concern</i>. The new guidance
addresses management’s responsibility to evaluate whether
there is substantial doubt about an entity’s ability to
continue as a going concern and to provide related footnote
disclosures. Management’s evaluation should be based on
relevant conditions and events that are known and reasonably
knowable at the date that the financial statements are issued. The
standard was effective for the annual reporting period ending after
December 15, 2016, and for annual and interim periods
thereafter. The adoption of this guidance did not have a material
impact on the Company’s consolidated financial statements and
related disclosures.</p>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-TOP: 12pt; TEXT-INDENT: 4%">
In November 2015, the FASB issued ASU <font style="WHITE-SPACE: nowrap">No. 2015-17,</font> <i>Balance Sheet
Classification of Deferred Taxes.</i> This guidance requires
companies to classify all deferred tax assets and liabilities as
noncurrent on the balance sheet instead of separating deferred
taxes into current and noncurrent amounts. This guidance allows for
adoption on either a prospective or retrospective basis and will be
effective on January 1, 2017. Early adoption is permitted. The
Company elected to early adopt this guidance on December 31,
2015. The adoption of this guidance did not have a material impact
on the Company’s consolidated financial statements and
related disclosures.</p>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-TOP: 12pt; TEXT-INDENT: 4%">
In February 2016, the FASB issued ASU <font style="WHITE-SPACE: nowrap">No. 2016-02,</font> <i>Leases</i>. This
guidance will require that lease arrangements longer than 12 months
result in an entity recognizing an asset and liability equal to the
present value of the lease payments in the statement of financial
position. This guidance is effective for annual periods beginning
after December 15, 2018, and interim periods therein. This
standard requires a modified retrospective transition approach for
all leases existing at, or entered into after, the date of initial
application, with an option to use certain transition relief. Early
adoption is permitted. The Company is evaluating the effect that
this guidance will have on its consolidated financial
statements.</p>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-TOP: 12pt; TEXT-INDENT: 4%">
In March 2016, the FASB issued ASU <font style="WHITE-SPACE: nowrap">No. 2016-09,</font> <i>Improvements to
Employee Share-Based Payment Accounting</i>. This guidance involves
several aspects of the accounting for share-based payment
transactions, including the income tax consequences, classification
of awards as either equity or liabilities and classification on the
statement of cash flows. This guidance allows for adoption on
either a prospective or retrospective basis and will be effective
on January 1, 2017. Early adoption is permitted. The adoption
of this guidance will have no impact on the Company’s
consolidated financial statements.</p>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-TOP: 12pt; TEXT-INDENT: 4%">
In August 2016, the FASB issued ASU <font style="WHITE-SPACE: nowrap">No. 2016-15,</font> <i>Statement of Cash
Flows: Classification of Certain Cash Receipts and Cash
Payments</i>. This guidance addresses the presentation and
classification of certain cash receipts and cash payments in the
statement of cash flows. The standard will be effective for annual
periods beginning after December 15, 2017, and interim periods
therein. Early adoption is permitted. The Company is evaluating the
effect that this guidance will have on its consolidated financial
statements.</p>
</div>
-58225000
Upon entering into the 2014 Credit Facility, the Company was obligated to make monthly, interest-only payments on any term loans funded under the 2014 Credit Facility until December 1, 2014 and, thereafter, to pay 36 consecutive, equal monthly installments of principal and interest from January 1, 2015 through December 1, 2017. As per the terms of the agreement, in June 2014, upon the completion of the Company’s IPO, the term of monthly, interest-only payments
-2715000
894000
<div>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-TOP: 18pt">
<b>Marketable securities</b></p>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-TOP: 6pt; TEXT-INDENT: 4%">
Marketable securities consist of investments with original
maturities greater than ninety days. The Company has classified its
investments with maturities beyond one year as short term, based on
their highly liquid nature and because such marketable securities
represent the investment of cash that is available for current
operations. The Company considers its investment portfolio of
investments as <font style="WHITE-SPACE: nowrap"><font style="WHITE-SPACE: nowrap">available-for-sale.</font></font>
Accordingly, these investments are recorded at fair value, which is
based on quoted market prices. Unrealized gains and losses are
reported as a component of accumulated other comprehensive income
(loss) in stockholders’ equity. Realized gains and losses and
declines in value judged to be other than temporary are included as
a component of other income (expense), net based on the specific
identification method. When determining whether a decline in value
is other than temporary, the Company considers various factors,
including whether the Company has the intent to sell the security,
and whether it is more likely than not that the Company will be
required to sell the security prior to recovery of its amortized
cost basis. Fair value is determined based on quoted market
prices.</p>
</div>
847000
127000
<div>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-TOP: 6pt; TEXT-INDENT: 4%">
The following information has been derived from unaudited
consolidated financial statements that, in the opinion of
management, include all recurring adjustments necessary for a fair
statement of such information.</p>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 12pt; MARGIN-TOP: 0pt">
 </p>
<table style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; BORDER-COLLAPSE: collapse" cellspacing="0" cellpadding="0" width="92%" align="center" border="0">
<tr>
<td width="43%"></td>
<td valign="bottom" width="10%"></td>
<td></td>
<td></td>
<td></td>
<td valign="bottom" width="9%"></td>
<td></td>
<td></td>
<td></td>
<td valign="bottom" width="9%"></td>
<td></td>
<td></td>
<td></td>
<td valign="bottom" width="9%"></td>
<td></td>
<td></td>
<td></td>
</tr>
<tr style="FONT-SIZE: 8pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid">
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td style="BORDER-BOTTOM: #000000 1pt solid" valign="bottom" colspan="14" align="center"><b>Three Months Ended</b></td>
<td valign="bottom"> </td>
</tr>
<tr style="FONT-SIZE: 8pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid">
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td valign="bottom" colspan="2" align="center">
<b>March 31,</b></td>
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td valign="bottom" colspan="2" align="center">
<b>June 30,</b></td>
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td valign="bottom" colspan="2" align="center">
<b>September 30,</b></td>
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td valign="bottom" colspan="2" align="center">
<b>December 31,</b></td>
<td valign="bottom"> </td>
</tr>
<tr style="FONT-SIZE: 8pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid">
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td style="BORDER-BOTTOM: #000000 1pt solid" valign="bottom" colspan="2" align="center"><b>2016</b></td>
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td style="BORDER-BOTTOM: #000000 1pt solid" valign="bottom" colspan="2" align="center"><b>2016</b></td>
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td style="BORDER-BOTTOM: #000000 1pt solid" valign="bottom" colspan="2" align="center"><b>2016</b></td>
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td style="BORDER-BOTTOM: #000000 1pt solid" valign="bottom" colspan="2" align="center"><b>2016</b></td>
<td valign="bottom"> </td>
</tr>
<tr style="FONT-SIZE: 8pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid">
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td valign="bottom" colspan="14" align="center"><b>(in thousands,
except per share data)</b></td>
<td valign="bottom"> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid" bgcolor="#CCEEFF">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-LEFT: 1em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Revenue</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom" nowrap="nowrap">$</td>
<td valign="bottom" nowrap="nowrap" align="right">
—  </td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom" nowrap="nowrap">$</td>
<td valign="bottom" nowrap="nowrap" align="right">
—  </td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom" nowrap="nowrap">$</td>
<td valign="bottom" nowrap="nowrap" align="right">
—  </td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom" nowrap="nowrap">$</td>
<td valign="bottom" nowrap="nowrap" align="right">
—  </td>
<td valign="bottom" nowrap="nowrap"> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-LEFT: 1em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Operating expenses</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">17,857</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">15,062</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">14,831</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">10,475</td>
<td valign="bottom" nowrap="nowrap"> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid" bgcolor="#CCEEFF">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-LEFT: 1em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Net loss</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">(17,736</td>
<td valign="bottom" nowrap="nowrap">) </td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">(15,028</td>
<td valign="bottom" nowrap="nowrap">) </td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">(14,675</td>
<td valign="bottom" nowrap="nowrap">) </td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">(10,439</td>
<td valign="bottom" nowrap="nowrap">) </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-LEFT: 1em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Net loss per share, basic and diluted</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom">$</td>
<td valign="bottom" align="right">(0.65</td>
<td valign="bottom" nowrap="nowrap">) </td>
<td valign="bottom">  </td>
<td valign="bottom">$</td>
<td valign="bottom" align="right">(0.55</td>
<td valign="bottom" nowrap="nowrap">) </td>
<td valign="bottom">  </td>
<td valign="bottom">$</td>
<td valign="bottom" align="right">(0.54</td>
<td valign="bottom" nowrap="nowrap">) </td>
<td valign="bottom">  </td>
<td valign="bottom">$</td>
<td valign="bottom" align="right">(0.38</td>
<td valign="bottom" nowrap="nowrap">) </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid" bgcolor="#CCEEFF">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-LEFT: 1em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Weighted average common shares outstanding, basic and diluted</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">27,263,435</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">27,272,225</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">27,322,907</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">27,332,515</td>
<td valign="bottom" nowrap="nowrap"> </td>
</tr>
<tr style="FONT-SIZE: 1pt">
<td height="16"></td>
<td height="16" colspan="16"></td>
</tr>
<tr style="FONT-SIZE: 8pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid">
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td style="BORDER-BOTTOM: #000000 1pt solid" valign="bottom" colspan="14" align="center"><b>Three Months Ended</b></td>
<td valign="bottom"> </td>
</tr>
<tr style="FONT-SIZE: 8pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid">
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td valign="bottom" colspan="2" align="center">
<b>March 31,</b></td>
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td valign="bottom" colspan="2" align="center">
<b>June 30,</b></td>
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td valign="bottom" colspan="2" align="center">
<b>September 30,</b></td>
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td valign="bottom" colspan="2" align="center">
<b>December 31,</b></td>
<td valign="bottom"> </td>
</tr>
<tr style="FONT-SIZE: 8pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid">
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td style="BORDER-BOTTOM: #000000 1pt solid" valign="bottom" colspan="2" align="center"><b>2015</b></td>
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td style="BORDER-BOTTOM: #000000 1pt solid" valign="bottom" colspan="2" align="center"><b>2015</b></td>
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td style="BORDER-BOTTOM: #000000 1pt solid" valign="bottom" colspan="2" align="center"><b>2015</b></td>
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td style="BORDER-BOTTOM: #000000 1pt solid" valign="bottom" colspan="2" align="center"><b>2015</b></td>
<td valign="bottom"> </td>
</tr>
<tr style="FONT-SIZE: 8pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid">
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td valign="bottom" colspan="14" align="center"><b>(in thousands,
except per share data)</b></td>
<td valign="bottom"> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid" bgcolor="#CCEEFF">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-LEFT: 1em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Revenue</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom" nowrap="nowrap">$</td>
<td valign="bottom" nowrap="nowrap" align="right">
—  </td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom" nowrap="nowrap">$</td>
<td valign="bottom" nowrap="nowrap" align="right">
—  </td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom" nowrap="nowrap">$</td>
<td valign="bottom" nowrap="nowrap" align="right">
—  </td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom" nowrap="nowrap">$</td>
<td valign="bottom" nowrap="nowrap" align="right">
—  </td>
<td valign="bottom" nowrap="nowrap"> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-LEFT: 1em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Operating expenses</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">13,240</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">17,610</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">19,717</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">23,246</td>
<td valign="bottom" nowrap="nowrap"> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid" bgcolor="#CCEEFF">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-LEFT: 1em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Net loss</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">(13,472</td>
<td valign="bottom" nowrap="nowrap">) </td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">(17,756</td>
<td valign="bottom" nowrap="nowrap">) </td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">(19,884</td>
<td valign="bottom" nowrap="nowrap">) </td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">(23,174</td>
<td valign="bottom" nowrap="nowrap">) </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-LEFT: 1em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Net loss per share, basic and diluted</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom">$</td>
<td valign="bottom" align="right">(0.53</td>
<td valign="bottom" nowrap="nowrap">) </td>
<td valign="bottom">  </td>
<td valign="bottom">$</td>
<td valign="bottom" align="right">(0.66</td>
<td valign="bottom" nowrap="nowrap">) </td>
<td valign="bottom">  </td>
<td valign="bottom">$</td>
<td valign="bottom" align="right">(0.73</td>
<td valign="bottom" nowrap="nowrap">) </td>
<td valign="bottom">  </td>
<td valign="bottom">$</td>
<td valign="bottom" align="right">(0.85</td>
<td valign="bottom" nowrap="nowrap">) </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid" bgcolor="#CCEEFF">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-LEFT: 1em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Weighted average common shares outstanding, basic and diluted</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">25,615,282</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">27,011,960</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">27,138,667</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">27,238,079</td>
<td valign="bottom" nowrap="nowrap"> </td>
</tr>
</table>
</div>
0
1037000
0
-51975000
<div>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-TOP: 18pt">
<b>Income Taxes</b></p>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-TOP: 6pt; TEXT-INDENT: 4%">
The Company accounts for income taxes using the asset and liability
method, which requires the recognition of deferred tax assets and
liabilities for the expected future tax consequences of events that
have been recognized in the consolidated financial statements or in
the Company’s tax returns. Deferred taxes are determined
based on the difference between the financial statement and tax
basis of assets and liabilities using enacted tax rates in effect
in the years in which the differences are expected to reverse.
Changes in deferred tax assets and liabilities are recorded in the
provision for income taxes. The Company assesses the likelihood
that its deferred tax assets will be recovered from future taxable
income and, to the extent it believes, based upon the weight of
available evidence, that it is more likely than not that all or a
portion of deferred tax assets will not be realized, a valuation
allowance is established through a charge to income tax expense.
Potential for recovery of deferred tax assets is evaluated by
estimating the future taxable profits expected and considering
prudent and feasible tax planning strategies.</p>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-TOP: 12pt; TEXT-INDENT: 4%">
The Company accounts for uncertainty in income taxes recognized in
the consolidated financial statements by applying a <font style="WHITE-SPACE: nowrap">two-step</font> process to determine the
amount of tax benefit to be recognized. First, the tax position
must be evaluated to determine the likelihood that it will be
sustained upon external examination by the taxing authorities. If
the tax position is deemed <font style="WHITE-SPACE: nowrap">more-likely-than-not</font> to be sustained,
the tax position is then assessed to determine the amount of
benefit to recognize in the consolidated financial statements. The
amount of the benefit that may be recognized is the largest amount
that has a greater than 50% likelihood of being realized upon
ultimate settlement. The provision for income taxes includes the
effects of any resulting tax reserves, or unrecognized tax
benefits, that are considered appropriate as well as the related
net interest and penalties.</p>
</div>
660000
<div>
<p style="margin-top:18pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">
<b>7. Stockholders’ Equity</b></p>
<p style="margin-top:6pt; margin-bottom:0pt; text-indent:4%; font-size:10pt; font-family:Times New Roman">
On January 28, 2015, the Company completed a <font style="white-space:nowrap">follow-on</font> offering of its common stock,
which resulted in the sale of 3,942,200 shares at a price of $35.00
per share. The Company received net proceeds from the <font style="white-space:nowrap">follow-on</font> offering of
$130.0 million based upon the price of $35.00 per share after
deducting underwriting discounts and commissions paid by the
Company. The Company also incurred offering costs of
$0.5 million related to the <font style="white-space:nowrap">follow-on</font> offering.</p>
<p style="font-size:1px;margin-top:12px;margin-bottom:0px">
 </p>
<p style="margin-top:0pt; margin-bottom:0pt; text-indent:4%; font-size:10pt; font-family:Times New Roman">
As of December 31, 2016 and 2015, the Company’s
Certificate of Incorporation, as amended and restated, authorizes
the Company to issue 5,000,000 shares of $0.001 par value preferred
stock. The rights, preferences, restrictions, qualifications and
limitations of such stock are to be determined by the
Company’s board of directors.</p>
<p style="margin-top:12pt; margin-bottom:0pt; text-indent:4%; font-size:10pt; font-family:Times New Roman">
As of December 31, 2016 and 2015, the Company’s
Certificate of Incorporation, as amended and restated, authorizes
the Company to issue 115,000,000 shares of $0.001 par value common
stock.</p>
</div>
35000
<div>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-TOP: 6pt">
<b>Use of Estimates</b></p>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-TOP: 6pt; TEXT-INDENT: 4%">
The preparation of financial statements in conformity with GAAP
requires management to make estimates and assumptions that affect
the reported amounts of assets and liabilities, the disclosure of
contingent assets and liabilities as of the date of the
consolidated financial statements, and the reported amounts of
expenses during the reporting periods. Significant estimates and
assumptions reflected in these consolidated financial statements
include, but are not limited to, the accrual of research and
development expenses and the valuation of stock-based awards.
Estimates are periodically reviewed in light of changes in
circumstances, facts and experience. Actual results could differ
from the Company’s estimates.</p>
</div>
<div>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-TOP: 18pt">
<b>Segment Data</b></p>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-TOP: 6pt; TEXT-INDENT: 4%">
The Company manages its operations as a single segment for the
purposes of assessing performance and making operating decisions.
The Company’s singular focus is on advancing novel
therapeutics for patients suffering from type 2 diabetes, severe
obesity and obesity-related disorders. No revenue has been
generated since inception, and all tangible assets are held in the
United States.</p>
</div>
<div>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-TOP: 12pt; TEXT-INDENT: 4%">
The following table summarizes the restructuring reserve for the
periods indicated:</p>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 12pt; MARGIN-TOP: 0pt">
 </p>
<table style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; BORDER-COLLAPSE: collapse" cellspacing="0" cellpadding="0" width="68%" align="center" border="0">
<tr>
<td width="74%"></td>
<td valign="bottom" width="22%"></td>
<td></td>
<td></td>
<td></td>
</tr>
<tr style="FONT-SIZE: 8pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid">
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td style="BORDER-BOTTOM: #000000 1pt solid" valign="bottom" colspan="2" align="center"><b>Year Ended</b><br />
<b>December 31, 2016</b></td>
<td valign="bottom"> </td>
</tr>
<tr style="FONT-SIZE: 8pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid">
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td valign="bottom" colspan="2" align="center"><b>(in
thousands)</b></td>
<td valign="bottom"> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid" bgcolor="#CCEEFF">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-LEFT: 1em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Restructuring reserve beginning balance</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom" nowrap="nowrap">$</td>
<td valign="bottom" nowrap="nowrap" align="right">
—  </td>
<td valign="bottom" nowrap="nowrap"> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-LEFT: 3em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Restructuring expenses incurred during the period</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">1,223</td>
<td valign="bottom" nowrap="nowrap"> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid" bgcolor="#CCEEFF">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-LEFT: 3em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Amounts paid during the period</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">(847</td>
<td valign="bottom" nowrap="nowrap">) </td>
</tr>
<tr style="FONT-SIZE: 1px">
<td valign="bottom"></td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-LEFT: 1em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Restructuring reserve ending balance</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom">$</td>
<td valign="bottom" align="right">376</td>
<td valign="bottom" nowrap="nowrap"> </td>
</tr>
<tr style="FONT-SIZE: 1px">
<td valign="bottom"></td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
</tr>
</table>
</div>
<div>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-TOP: 18pt">
<b>Property and Equipment</b></p>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-TOP: 6pt; TEXT-INDENT: 4%">
Property and equipment are stated at cost less accumulated
depreciation. Depreciation expense is recognized using the
straight-line method over a five-year estimated useful life for
equipment, furniture and fixtures and office equipment. Leasehold
improvements are amortized over the shorter of the asset life or
the term of the lease agreement. Expenditures for repairs and
maintenance of assets are charged to expense as incurred. Upon
retirement or sale, the cost and related accumulated depreciation
of assets disposed of are removed from the accounts and any
resulting gain or loss is included in loss from operations.</p>
</div>
1400000
<div>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-TOP: 6pt; TEXT-INDENT: 4%">
The assumptions that the Company used to determine the fair value
of the stock options granted to employees and directors are as
follows, presented on a weighted average basis:</p>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 12pt; MARGIN-TOP: 0pt">
 </p>
<table style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; BORDER-COLLAPSE: collapse" cellspacing="0" cellpadding="0" width="76%" align="center" border="0">
<tr>
<td width="75%"></td>
<td valign="bottom" width="6%"></td>
<td></td>
<td></td>
<td></td>
<td valign="bottom" width="5%"></td>
<td></td>
<td></td>
<td></td>
<td valign="bottom" width="5%"></td>
<td></td>
<td></td>
<td></td>
</tr>
<tr style="FONT-SIZE: 8pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid">
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td style="BORDER-BOTTOM: #000000 1pt solid" valign="bottom" colspan="2" align="center"><b>2016</b></td>
<td valign="bottom"> </td>
<td valign="bottom"> </td>
<td style="BORDER-BOTTOM: #000000 1pt solid" valign="bottom" colspan="2" align="center"><b>2015</b></td>
<td valign="bottom"> </td>
<td valign="bottom"> </td>
<td style="BORDER-BOTTOM: #000000 1pt solid" valign="bottom" colspan="2" align="center"><b>2014</b></td>
<td valign="bottom"> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid" bgcolor="#CCEEFF">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-LEFT: 1em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Risk-free interest rate</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">1.40</td>
<td valign="bottom" nowrap="nowrap">% </td>
<td valign="bottom"> </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">1.75</td>
<td valign="bottom" nowrap="nowrap">% </td>
<td valign="bottom"> </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">1.90</td>
<td valign="bottom" nowrap="nowrap">% </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-LEFT: 1em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Expected term (in years)</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">6.18</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom"> </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">6.25</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom"> </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">6.25</td>
<td valign="bottom" nowrap="nowrap"> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid" bgcolor="#CCEEFF">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-LEFT: 1em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Expected volatility</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">87</td>
<td valign="bottom" nowrap="nowrap">% </td>
<td valign="bottom"> </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">87</td>
<td valign="bottom" nowrap="nowrap">% </td>
<td valign="bottom"> </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">90</td>
<td valign="bottom" nowrap="nowrap">% </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-LEFT: 1em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Expected dividend yield</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">0</td>
<td valign="bottom" nowrap="nowrap">% </td>
<td valign="bottom"> </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">0</td>
<td valign="bottom" nowrap="nowrap">% </td>
<td valign="bottom"> </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">0</td>
<td valign="bottom" nowrap="nowrap">% </td>
</tr>
</table>
</div>
<div>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-TOP: 12pt; TEXT-INDENT: 4%">
The Company excluded the following common stock equivalents,
outstanding as of December 31, 2016, 2015 and 2014, from the
computation of diluted net loss per share attributable to common
stockholders for the years ended December 31, 2016, 2015 and
2014 because they had an anti-dilutive impact due to the net loss
attributable to common stockholders incurred for the periods:</p>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 12pt; MARGIN-TOP: 0pt">
 </p>
<table style="FONT-SIZE: 8pt; FONT-FAMILY: Times New Roman; BORDER-COLLAPSE: collapse" cellspacing="0" cellpadding="0" width="100%" align="center" border="0">
<tr>
<td width="63%"></td>
<td valign="bottom" width="2%"></td>
<td></td>
<td></td>
<td></td>
<td valign="bottom" width="2%"></td>
<td></td>
<td></td>
<td></td>
<td valign="bottom" width="2%"></td>
<td></td>
<td></td>
<td></td>
</tr>
<tr style="FONT-SIZE: 8pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid">
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td style="BORDER-BOTTOM: #000000 1pt solid" valign="bottom" colspan="10" align="center"><b>As of December 31,</b></td>
<td valign="bottom"> </td>
</tr>
<tr style="FONT-SIZE: 8pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid">
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td style="BORDER-BOTTOM: #000000 1pt solid" valign="bottom" colspan="2" align="center"><b>2016</b></td>
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td style="BORDER-BOTTOM: #000000 1pt solid" valign="bottom" colspan="2" align="center"><b>2015</b></td>
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td style="BORDER-BOTTOM: #000000 1pt solid" valign="bottom" colspan="2" align="center"><b>2014</b></td>
<td valign="bottom"> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid" bgcolor="#CCEEFF">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-LEFT: 1em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Options to purchase common stock</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">
    3,115,003</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">2,555,110</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">  2,008,574</td>
<td valign="bottom" nowrap="nowrap"> </td>
</tr>
<tr style="FONT-SIZE: 1px">
<td valign="bottom"></td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
</tr>
</table>
</div>
P7Y2M12D
<div>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-TOP: 6pt; TEXT-INDENT: 4%">
Basic and diluted net loss per share attributable to common
stockholders was calculated as follows:</p>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 12pt; MARGIN-TOP: 0pt">
 </p>
<table style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; BORDER-COLLAPSE: collapse" cellspacing="0" cellpadding="0" width="100%" align="center" border="0">
<tr>
<td width="64%"></td>
<td valign="bottom" width="6%"></td>
<td></td>
<td></td>
<td></td>
<td valign="bottom" width="6%"></td>
<td></td>
<td></td>
<td></td>
<td valign="bottom" width="6%"></td>
<td></td>
<td></td>
<td></td>
</tr>
<tr style="FONT-SIZE: 8pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid">
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td style="BORDER-BOTTOM: #000000 1pt solid" valign="bottom" colspan="10" align="center"><b>Year
Ended December 31,</b></td>
<td valign="bottom"> </td>
</tr>
<tr style="FONT-SIZE: 8pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid">
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td style="BORDER-BOTTOM: #000000 1pt solid" valign="bottom" colspan="2" align="center"><b>2016</b></td>
<td valign="bottom"> </td>
<td valign="bottom"> </td>
<td style="BORDER-BOTTOM: #000000 1pt solid" valign="bottom" colspan="2" align="center"><b>2015</b></td>
<td valign="bottom"> </td>
<td valign="bottom"> </td>
<td style="BORDER-BOTTOM: #000000 1pt solid" valign="bottom" colspan="2" align="center"><b>2014</b></td>
<td valign="bottom"> </td>
</tr>
<tr style="FONT-SIZE: 8pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid">
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td valign="bottom" colspan="10" align="center"><b>(in thousands,
except per share data)</b></td>
<td valign="bottom"> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid" bgcolor="#CCEEFF">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-LEFT: 1em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Basic and diluted net loss per share attributable to common
stockholders:</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom"> </td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom"> </td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom"></td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-LEFT: 3em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Numerator:</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom"> </td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom"> </td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom"></td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid" bgcolor="#CCEEFF">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-LEFT: 5em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Net loss</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom">$</td>
<td valign="bottom" align="right">(57,878</td>
<td valign="bottom" nowrap="nowrap">) </td>
<td valign="bottom"> </td>
<td valign="bottom">$</td>
<td valign="bottom" align="right">(74,286</td>
<td valign="bottom" nowrap="nowrap">) </td>
<td valign="bottom"> </td>
<td valign="bottom">$</td>
<td valign="bottom" align="right">(36,478</td>
<td valign="bottom" nowrap="nowrap">) </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-LEFT: 5em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Accretion of redeemable convertible preferred stock to redemption
value</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom" nowrap="nowrap" align="right">
—  </td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom"> </td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom" nowrap="nowrap" align="right">
—  </td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom"> </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">(92</td>
<td valign="bottom" nowrap="nowrap">) </td>
</tr>
<tr style="FONT-SIZE: 1px">
<td valign="bottom"></td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
<td valign="bottom"> </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
<td valign="bottom"> </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid" bgcolor="#CCEEFF">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-LEFT: 7em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Net loss attributable to common stockholders</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom">$</td>
<td valign="bottom" align="right">(57,878</td>
<td valign="bottom" nowrap="nowrap">) </td>
<td valign="bottom"> </td>
<td valign="bottom">$</td>
<td valign="bottom" align="right">(74,286</td>
<td valign="bottom" nowrap="nowrap">) </td>
<td valign="bottom"> </td>
<td valign="bottom">$</td>
<td valign="bottom" align="right">(36,570</td>
<td valign="bottom" nowrap="nowrap">) </td>
</tr>
<tr style="FONT-SIZE: 1px">
<td valign="bottom"></td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
<td valign="bottom"> </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
<td valign="bottom"> </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-LEFT: 3em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Denominator:</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom"> </td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom"> </td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom"></td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid" bgcolor="#CCEEFF">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-LEFT: 5em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Weighted average common shares outstanding, basic and diluted</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">27,297,934</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom"> </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">26,756,079</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom"> </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right"> 12,189,155</td>
<td valign="bottom" nowrap="nowrap"> </td>
</tr>
<tr style="FONT-SIZE: 1px">
<td valign="bottom"></td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
<td valign="bottom"> </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
<td valign="bottom"> </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-LEFT: 3em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Net loss per share attributable to common stockholders, basic and
diluted</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom">$</td>
<td valign="bottom" align="right">(2.12</td>
<td valign="bottom" nowrap="nowrap">) </td>
<td valign="bottom"> </td>
<td valign="bottom">$</td>
<td valign="bottom" align="right">(2.78</td>
<td valign="bottom" nowrap="nowrap">) </td>
<td valign="bottom"> </td>
<td valign="bottom">$</td>
<td valign="bottom" align="right">(3.00</td>
<td valign="bottom" nowrap="nowrap">) </td>
</tr>
<tr style="FONT-SIZE: 1px">
<td valign="bottom"></td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
<td valign="bottom"> </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
<td valign="bottom"> </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
</tr>
</table>
</div>
<div>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-TOP: 6pt; TEXT-INDENT: 4%">
The Company recorded stock-based compensation expense related to
stock options and restricted common stock in the following expense
categories within its consolidated statements of operations:</p>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 12pt; MARGIN-TOP: 0pt">
 </p>
<table style="FONT-SIZE: 8pt; FONT-FAMILY: Times New Roman; BORDER-COLLAPSE: collapse" cellspacing="0" cellpadding="0" width="100%" align="center" border="0">
<tr>
<td width="63%"></td>
<td valign="bottom" width="3%"></td>
<td></td>
<td></td>
<td></td>
<td valign="bottom" width="3%"></td>
<td></td>
<td></td>
<td></td>
<td valign="bottom" width="3%"></td>
<td></td>
<td></td>
<td></td>
</tr>
<tr style="FONT-SIZE: 8pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid">
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td style="BORDER-BOTTOM: #000000 1pt solid" valign="bottom" colspan="10" align="center"><b>Year Ended
December 31,</b></td>
<td valign="bottom"> </td>
</tr>
<tr style="FONT-SIZE: 8pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid">
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td style="BORDER-BOTTOM: #000000 1pt solid" valign="bottom" colspan="2" align="center"><b>2016</b></td>
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td style="BORDER-BOTTOM: #000000 1pt solid" valign="bottom" colspan="2" align="center"><b>2015</b></td>
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td style="BORDER-BOTTOM: #000000 1pt solid" valign="bottom" colspan="2" align="center"><b>2014</b></td>
<td valign="bottom"> </td>
</tr>
<tr style="FONT-SIZE: 8pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid">
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td valign="bottom" colspan="10" align="center"><b>(in
thousands)</b></td>
<td valign="bottom"> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid" bgcolor="#CCEEFF">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-LEFT: 1em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Research and development</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom">$</td>
<td valign="bottom" align="right">3,543</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom">$</td>
<td valign="bottom" align="right">2,930</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom">$</td>
<td valign="bottom" align="right">
         490</td>
<td valign="bottom" nowrap="nowrap"> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-LEFT: 1em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
General and administrative</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">6,390</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">5,652</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">1,063</td>
<td valign="bottom" nowrap="nowrap"> </td>
</tr>
<tr style="FONT-SIZE: 1px">
<td valign="bottom"></td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid" bgcolor="#CCEEFF">
<td valign="top"></td>
<td valign="bottom">  </td>
<td valign="bottom">$</td>
<td valign="bottom" align="right">
         9,933</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom">$</td>
<td valign="bottom" align="right">
         8,582</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom">$</td>
<td valign="bottom" align="right">1,553</td>
<td valign="bottom" nowrap="nowrap"> </td>
</tr>
<tr style="FONT-SIZE: 1px">
<td valign="bottom"></td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
</tr>
</table>
</div>
0.00
6.65
P5Y6M
16.90
1403000
<div>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-TOP: 0pt; TEXT-INDENT: 4%">
Changes in the valuation allowance for deferred tax assets during
the years ended December 31, 2016, 2015 and 2014 related
primarily to the increase in net operating loss carryforwards,
capitalized research and development expenses and tax credit
carryforwards and were as follows:</p>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 12pt; MARGIN-TOP: 0pt">
 </p>
<table style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; BORDER-COLLAPSE: collapse" cellspacing="0" cellpadding="0" width="92%" align="center" border="0">
<tr>
<td width="70%"></td>
<td valign="bottom" width="4%"></td>
<td></td>
<td></td>
<td></td>
<td valign="bottom" width="4%"></td>
<td></td>
<td></td>
<td></td>
<td valign="bottom" width="4%"></td>
<td></td>
<td></td>
<td></td>
</tr>
<tr style="FONT-SIZE: 8pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid">
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td style="BORDER-BOTTOM: #000000 1pt solid" valign="bottom" colspan="10" align="center"><b>Year Ended
December 31,</b></td>
<td valign="bottom"> </td>
</tr>
<tr style="FONT-SIZE: 8pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid">
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td style="BORDER-BOTTOM: #000000 1pt solid" valign="bottom" colspan="2" align="center"><b>2016</b></td>
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td style="BORDER-BOTTOM: #000000 1pt solid" valign="bottom" colspan="2" align="center"><b>2015</b></td>
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td style="BORDER-BOTTOM: #000000 1pt solid" valign="bottom" colspan="2" align="center"><b>2014</b></td>
<td valign="bottom"> </td>
</tr>
<tr style="FONT-SIZE: 8pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid">
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td valign="bottom" colspan="10" align="center"><b>(in
thousands)</b></td>
<td valign="bottom"> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid" bgcolor="#CCEEFF">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-LEFT: 1em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Valuation allowance as of beginning of year</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom">$</td>
<td valign="bottom" align="right">74,541</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom">$</td>
<td valign="bottom" align="right">42,398</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom">$</td>
<td valign="bottom" align="right">27,831</td>
<td valign="bottom" nowrap="nowrap"> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-LEFT: 3em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Decreases recorded as benefit to income tax provision</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom" nowrap="nowrap" align="right">
—  </td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom" nowrap="nowrap" align="right">
—  </td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom" nowrap="nowrap" align="right">
—  </td>
<td valign="bottom" nowrap="nowrap"> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid" bgcolor="#CCEEFF">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-LEFT: 3em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Increases recorded to income tax provision</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">23,179</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">32,143</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">14,567</td>
<td valign="bottom" nowrap="nowrap"> </td>
</tr>
<tr style="FONT-SIZE: 1px">
<td valign="bottom"></td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-LEFT: 1em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Valuation allowance as of end of year</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom">$</td>
<td valign="bottom" align="right">97,720</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom">$</td>
<td valign="bottom" align="right">74,541</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom">$</td>
<td valign="bottom" align="right">42,398</td>
<td valign="bottom" nowrap="nowrap"> </td>
</tr>
<tr style="FONT-SIZE: 1px">
<td valign="bottom"></td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
</tr>
</table>
</div>
<div>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; WHITE-SPACE: normal; WORD-SPACING: 0px; TEXT-TRANSFORM: none; FONT-WEIGHT: normal; COLOR: rgb(0,0,0); FONT-STYLE: normal; ORPHANS: 2; WIDOWS: 2; MARGIN-TOP: 12pt; LETTER-SPACING: normal; TEXT-INDENT: 4%; font-variant-ligatures: normal; font-variant-caps: normal; -webkit-text-stroke-width: 0px">
Net deferred tax assets as of December 31, 2016 and 2015
consisted of the following:</p>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 12pt; FONT-FAMILY: "Times New Roman"; WHITE-SPACE: normal; WORD-SPACING: 0px; TEXT-TRANSFORM: none; FONT-WEIGHT: normal; COLOR: rgb(0,0,0); FONT-STYLE: normal; ORPHANS: 2; WIDOWS: 2; MARGIN-TOP: 0pt; LETTER-SPACING: normal; TEXT-INDENT: 0px; font-variant-ligatures: normal; font-variant-caps: normal; -webkit-text-stroke-width: 0px">
 </p>
<table style="FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; WORD-SPACING: 0px; BORDER-COLLAPSE: collapse; TEXT-TRANSFORM: none; ORPHANS: 2; WIDOWS: 2; LETTER-SPACING: normal; TEXT-INDENT: 0px; -webkit-text-stroke-width: 0px" cellspacing="0" cellpadding="0" width="76%" align="center" border="0">
<tr>
<td width="71%"></td>
<td valign="bottom" width="12%"></td>
<td></td>
<td></td>
<td></td>
<td valign="bottom" width="11%"></td>
<td></td>
<td></td>
<td></td>
</tr>
<tr style="FONT-SIZE: 8pt; FONT-FAMILY: "Times New Roman"; break-inside: avoid">
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td style="BORDER-BOTTOM: rgb(0,0,0) 1pt solid" valign="bottom" colspan="6" align="center"><b>December 31,</b></td>
<td valign="bottom"> </td>
</tr>
<tr style="FONT-SIZE: 8pt; FONT-FAMILY: "Times New Roman"; break-inside: avoid">
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td style="BORDER-BOTTOM: rgb(0,0,0) 1pt solid" valign="bottom" colspan="2" align="center"><b>2016</b></td>
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td style="BORDER-BOTTOM: rgb(0,0,0) 1pt solid" valign="bottom" colspan="2" align="center"><b>2015</b></td>
<td valign="bottom"> </td>
</tr>
<tr style="FONT-SIZE: 8pt; FONT-FAMILY: "Times New Roman"; break-inside: avoid">
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td valign="bottom" colspan="6" align="center"><b>(in
thousands)</b></td>
<td valign="bottom"> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; break-inside: avoid" bgcolor="#CCEEFF">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; MARGIN-LEFT: 1em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Noncurrent deferred tax assets:</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom">  </td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom"></td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; break-inside: avoid">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; MARGIN-LEFT: 3em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Capitalized research and development expenses</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">59,489</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">46,568</td>
<td valign="bottom" nowrap="nowrap"> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; break-inside: avoid" bgcolor="#CCEEFF">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; MARGIN-LEFT: 3em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Net operating loss carryforwards</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">14,991</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">11,186</td>
<td valign="bottom" nowrap="nowrap"> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; break-inside: avoid">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; MARGIN-LEFT: 3em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Tax credit carryforwards</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">14,297</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">11,570</td>
<td valign="bottom" nowrap="nowrap"> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; break-inside: avoid" bgcolor="#CCEEFF">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; MARGIN-LEFT: 3em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Capitalized legal expenses</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">2,119</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">1,773</td>
<td valign="bottom" nowrap="nowrap"> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; break-inside: avoid">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; MARGIN-LEFT: 3em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Stock-based compensation</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">6,027</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">2,780</td>
<td valign="bottom" nowrap="nowrap"> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; break-inside: avoid" bgcolor="#CCEEFF">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; MARGIN-LEFT: 3em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Accrued expenses</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">783</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">648</td>
<td valign="bottom" nowrap="nowrap"> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; break-inside: avoid">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; MARGIN-LEFT: 3em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Other temporary differences</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">14</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">16</td>
<td valign="bottom" nowrap="nowrap"> </td>
</tr>
<tr style="FONT-SIZE: 1px">
<td valign="bottom"></td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; break-inside: avoid" bgcolor="#CCEEFF">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; MARGIN-LEFT: 5em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Total noncurrent deferred tax assets</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">97,720</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">74,541</td>
<td valign="bottom" nowrap="nowrap"> </td>
</tr>
<tr style="FONT-SIZE: 1px">
<td valign="bottom"></td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; break-inside: avoid">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; MARGIN-LEFT: 5em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Total gross deferred tax assets</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">97,720</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">74,541</td>
<td valign="bottom" nowrap="nowrap"> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; break-inside: avoid" bgcolor="#CCEEFF">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; MARGIN-LEFT: 3em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Valuation allowance</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">(97,720</td>
<td valign="bottom" nowrap="nowrap">) </td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">(74,541</td>
<td valign="bottom" nowrap="nowrap">) </td>
</tr>
<tr style="FONT-SIZE: 1px">
<td valign="bottom"></td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; break-inside: avoid">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; MARGIN-LEFT: 5em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Net deferred tax assets</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom" nowrap="nowrap">$</td>
<td valign="bottom" nowrap="nowrap" align="right">
—  </td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom" nowrap="nowrap">$</td>
<td valign="bottom" nowrap="nowrap" align="right">
—  </td>
<td valign="bottom" nowrap="nowrap"> </td>
</tr>
<tr style="FONT-SIZE: 1px">
<td valign="bottom"></td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
</tr>
</table>
<p style="MARGIN-BOTTOM: 0px; FONT-SIZE: 1px; FONT-FAMILY: "Times New Roman"; WHITE-SPACE: normal; WORD-SPACING: 0px; TEXT-TRANSFORM: none; FONT-WEIGHT: normal; COLOR: rgb(0,0,0); FONT-STYLE: normal; ORPHANS: 2; WIDOWS: 2; MARGIN-TOP: 12px; LETTER-SPACING: normal; TEXT-INDENT: 0px; font-variant-ligatures: normal; font-variant-caps: normal; -webkit-text-stroke-width: 0px">
 </p>
</div>
<div>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-TOP: 12pt; TEXT-INDENT: 4%">
The domestic and foreign components of loss before income taxes are
as follows:</p>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 12pt; MARGIN-TOP: 0pt">
 </p>
<table style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; BORDER-COLLAPSE: collapse" cellspacing="0" cellpadding="0" width="84%" align="center" border="0">
<tr>
<td width="63%"></td>
<td valign="bottom" width="6%"></td>
<td></td>
<td></td>
<td></td>
<td valign="bottom" width="5%"></td>
<td></td>
<td></td>
<td></td>
<td valign="bottom" width="5%"></td>
<td></td>
<td></td>
<td></td>
</tr>
<tr style="FONT-SIZE: 8pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid">
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td style="BORDER-BOTTOM: #000000 1pt solid" valign="bottom" colspan="2" align="center"><b>2016</b></td>
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td style="BORDER-BOTTOM: #000000 1pt solid" valign="bottom" colspan="2" align="center"><b>2015</b></td>
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td style="BORDER-BOTTOM: #000000 1pt solid" valign="bottom" colspan="2" align="center"><b>2014</b></td>
<td valign="bottom"> </td>
</tr>
<tr style="FONT-SIZE: 8pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid">
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td valign="bottom" colspan="10" align="center"><b>(in
thousands)</b></td>
<td valign="bottom"> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid" bgcolor="#CCEEFF">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-LEFT: 1em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Domestic</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom">$</td>
<td valign="bottom" align="right">(57,799</td>
<td valign="bottom" nowrap="nowrap">) </td>
<td valign="bottom">  </td>
<td valign="bottom">$</td>
<td valign="bottom" align="right">(72,147</td>
<td valign="bottom" nowrap="nowrap">) </td>
<td valign="bottom">  </td>
<td valign="bottom">$</td>
<td valign="bottom" align="right">(35,818</td>
<td valign="bottom" nowrap="nowrap">) </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-LEFT: 1em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Foreign</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">(79</td>
<td valign="bottom" nowrap="nowrap">) </td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">(2,139</td>
<td valign="bottom" nowrap="nowrap">) </td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">(660</td>
<td valign="bottom" nowrap="nowrap">) </td>
</tr>
<tr style="FONT-SIZE: 1px">
<td valign="bottom"></td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid" bgcolor="#CCEEFF">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-LEFT: 1em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Loss before income taxes</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom">$</td>
<td valign="bottom" align="right">(57,878</td>
<td valign="bottom" nowrap="nowrap">) </td>
<td valign="bottom">  </td>
<td valign="bottom">$</td>
<td valign="bottom" align="right">(74,286</td>
<td valign="bottom" nowrap="nowrap">) </td>
<td valign="bottom">  </td>
<td valign="bottom">$</td>
<td valign="bottom" align="right">(36,478</td>
<td valign="bottom" nowrap="nowrap">) </td>
</tr>
<tr style="FONT-SIZE: 1px">
<td valign="bottom"></td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
</tr>
</table>
</div>
<div>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-TOP: 12pt; TEXT-INDENT: 4%">
As of December 31, 2016, the estimated future principal
payments due are as follows:</p>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 12pt; MARGIN-TOP: 0pt">
 </p>
<table style="FONT-SIZE: 8pt; FONT-FAMILY: Times New Roman; BORDER-COLLAPSE: collapse" cellspacing="0" cellpadding="0" width="68%" align="center" border="0">
<tr>
<td width="86%"></td>
<td valign="bottom" width="8%"></td>
<td></td>
<td></td>
<td></td>
</tr>
<tr style="FONT-SIZE: 8pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid">
<td valign="bottom" nowrap="nowrap">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 8pt; FONT-FAMILY: Times New Roman; WIDTH: 95.55pt; BORDER-BOTTOM: #000000 1pt solid; MARGIN-TOP: 0pt">
<b>Years Ending December 31,</b></p>
</td>
<td valign="bottom">  </td>
<td valign="bottom" colspan="2"> </td>
<td valign="bottom"> </td>
</tr>
<tr style="FONT-SIZE: 8pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid">
<td valign="bottom"><b>(in thousands)</b></td>
<td valign="bottom">  </td>
<td valign="bottom" colspan="2"> </td>
<td valign="bottom"> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid" bgcolor="#CCEEFF">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-LEFT: 1em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
2017</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom">$</td>
<td valign="bottom" align="right">3,183</td>
<td valign="bottom" nowrap="nowrap"> </td>
</tr>
<tr style="FONT-SIZE: 1px">
<td valign="bottom"></td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-LEFT: 3em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Total</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom">$</td>
<td valign="bottom" align="right">3,183</td>
<td valign="bottom" nowrap="nowrap"> </td>
</tr>
<tr style="FONT-SIZE: 1px">
<td valign="bottom"></td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
</tr>
</table>
</div>
0.75
35000
<div>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; WHITE-SPACE: normal; WORD-SPACING: 0px; TEXT-TRANSFORM: none; FONT-WEIGHT: normal; COLOR: rgb(0,0,0); FONT-STYLE: normal; ORPHANS: 2; WIDOWS: 2; MARGIN-TOP: 12pt; LETTER-SPACING: normal; TEXT-INDENT: 4%; font-variant-ligatures: normal; font-variant-caps: normal; -webkit-text-stroke-width: 0px">
Future minimum lease payments for its operating leases as of
December 31, 2016 were as follows:</p>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 12pt; FONT-FAMILY: "Times New Roman"; WHITE-SPACE: normal; WORD-SPACING: 0px; TEXT-TRANSFORM: none; FONT-WEIGHT: normal; COLOR: rgb(0,0,0); FONT-STYLE: normal; ORPHANS: 2; WIDOWS: 2; MARGIN-TOP: 0pt; LETTER-SPACING: normal; TEXT-INDENT: 0px; font-variant-ligatures: normal; font-variant-caps: normal; -webkit-text-stroke-width: 0px">
 </p>
<table style="FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; WORD-SPACING: 0px; BORDER-COLLAPSE: collapse; TEXT-TRANSFORM: none; ORPHANS: 2; WIDOWS: 2; LETTER-SPACING: normal; TEXT-INDENT: 0px; -webkit-text-stroke-width: 0px" cellspacing="0" cellpadding="0" width="68%" align="center" border="0">
<tr>
<td width="89%"></td>
<td valign="bottom" width="7%"></td>
<td></td>
<td></td>
<td></td>
</tr>
<tr style="FONT-SIZE: 8pt; FONT-FAMILY: "Times New Roman"; break-inside: avoid">
<td valign="bottom" nowrap="nowrap">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 8pt; FONT-FAMILY: "Times New Roman"; WIDTH: 95.55pt; BORDER-BOTTOM: rgb(0,0,0) 1pt solid; MARGIN-TOP: 0pt">
<b>Years Ending December 31,</b></p>
</td>
<td valign="bottom">  </td>
<td valign="bottom" colspan="2"> </td>
<td valign="bottom"> </td>
</tr>
<tr style="FONT-SIZE: 8pt; FONT-FAMILY: "Times New Roman"; break-inside: avoid">
<td valign="bottom"><b>(in thousands)</b></td>
<td valign="bottom">  </td>
<td valign="bottom" colspan="2"> </td>
<td valign="bottom"> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; break-inside: avoid" bgcolor="#CCEEFF">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; MARGIN-LEFT: 1em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
2017</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom">$</td>
<td valign="bottom" align="right">300</td>
<td valign="bottom" nowrap="nowrap"> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; break-inside: avoid">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; MARGIN-LEFT: 1em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
2018</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">106</td>
<td valign="bottom" nowrap="nowrap"> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; break-inside: avoid" bgcolor="#CCEEFF">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; MARGIN-LEFT: 1em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
2019</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">82</td>
<td valign="bottom" nowrap="nowrap"> </td>
</tr>
<tr style="FONT-SIZE: 1px">
<td valign="bottom"></td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; break-inside: avoid">
<td valign="top"></td>
<td valign="bottom">  </td>
<td valign="bottom">$</td>
<td valign="bottom" align="right">488</td>
<td valign="bottom" nowrap="nowrap"> </td>
</tr>
<tr style="FONT-SIZE: 1px">
<td valign="bottom"></td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
</tr>
</table>
<br class="Apple-interchange-newline" /></div>
<div>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; WHITE-SPACE: normal; WORD-SPACING: 0px; TEXT-TRANSFORM: none; FONT-WEIGHT: normal; COLOR: rgb(0,0,0); FONT-STYLE: normal; ORPHANS: 2; WIDOWS: 2; MARGIN-TOP: 18pt; LETTER-SPACING: normal; TEXT-INDENT: 0px; font-variant-ligatures: normal; font-variant-caps: normal; -webkit-text-stroke-width: 0px">
<b>2. Summary of Significant Accounting Policies</b></p>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; WHITE-SPACE: normal; WORD-SPACING: 0px; TEXT-TRANSFORM: none; FONT-WEIGHT: normal; COLOR: rgb(0,0,0); FONT-STYLE: normal; ORPHANS: 2; WIDOWS: 2; MARGIN-TOP: 6pt; LETTER-SPACING: normal; TEXT-INDENT: 0px; font-variant-ligatures: normal; font-variant-caps: normal; -webkit-text-stroke-width: 0px">
<b>Use of Estimates</b></p>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; WHITE-SPACE: normal; WORD-SPACING: 0px; TEXT-TRANSFORM: none; FONT-WEIGHT: normal; COLOR: rgb(0,0,0); FONT-STYLE: normal; ORPHANS: 2; WIDOWS: 2; MARGIN-TOP: 6pt; LETTER-SPACING: normal; TEXT-INDENT: 4%; font-variant-ligatures: normal; font-variant-caps: normal; -webkit-text-stroke-width: 0px">
The preparation of financial statements in conformity with GAAP
requires management to make estimates and assumptions that affect
the reported amounts of assets and liabilities, the disclosure of
contingent assets and liabilities as of the date of the
consolidated financial statements, and the reported amounts of
expenses during the reporting periods. Significant estimates and
assumptions reflected in these consolidated financial statements
include, but are not limited to, the accrual of research and
development expenses and the valuation of stock-based awards.
Estimates are periodically reviewed in light of changes in
circumstances, facts and experience. Actual results could differ
from the Company’s estimates.</p>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; WHITE-SPACE: normal; WORD-SPACING: 0px; TEXT-TRANSFORM: none; FONT-WEIGHT: normal; COLOR: rgb(0,0,0); FONT-STYLE: normal; ORPHANS: 2; WIDOWS: 2; MARGIN-TOP: 18pt; LETTER-SPACING: normal; TEXT-INDENT: 0px; font-variant-ligatures: normal; font-variant-caps: normal; -webkit-text-stroke-width: 0px">
<b>Cash Equivalents</b></p>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; WHITE-SPACE: normal; WORD-SPACING: 0px; TEXT-TRANSFORM: none; FONT-WEIGHT: normal; COLOR: rgb(0,0,0); FONT-STYLE: normal; ORPHANS: 2; WIDOWS: 2; MARGIN-TOP: 6pt; LETTER-SPACING: normal; TEXT-INDENT: 4%; font-variant-ligatures: normal; font-variant-caps: normal; -webkit-text-stroke-width: 0px">
The Company considers all short-term, highly liquid investments
with original maturities of ninety days or less at acquisition date
to be cash equivalents. Cash equivalents, which consist of money
market funds, U.S. government securities, corporate bonds, and
commercial paper, are stated at fair value.</p>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; WHITE-SPACE: normal; WORD-SPACING: 0px; TEXT-TRANSFORM: none; FONT-WEIGHT: normal; COLOR: rgb(0,0,0); FONT-STYLE: normal; ORPHANS: 2; WIDOWS: 2; MARGIN-TOP: 18pt; LETTER-SPACING: normal; TEXT-INDENT: 0px; font-variant-ligatures: normal; font-variant-caps: normal; -webkit-text-stroke-width: 0px">
<b>Concentration of Credit Risk and of Significant
Suppliers</b></p>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; WHITE-SPACE: normal; WORD-SPACING: 0px; TEXT-TRANSFORM: none; FONT-WEIGHT: normal; COLOR: rgb(0,0,0); FONT-STYLE: normal; ORPHANS: 2; WIDOWS: 2; MARGIN-TOP: 6pt; LETTER-SPACING: normal; TEXT-INDENT: 4%; font-variant-ligatures: normal; font-variant-caps: normal; -webkit-text-stroke-width: 0px">
Financial instruments that potentially expose the Company to
concentrations of credit risk consist primarily of cash, cash
equivalents and marketable securities. The Company has all cash,
cash equivalents and marketable securities balances at two
accredited financial institutions in amounts that exceed federally
insured limits. The Company does not believe that it is subject to
unusual credit risk beyond the normal credit risk associated with
commercial banking relationships.</p>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; WHITE-SPACE: normal; WORD-SPACING: 0px; TEXT-TRANSFORM: none; FONT-WEIGHT: normal; COLOR: rgb(0,0,0); FONT-STYLE: normal; ORPHANS: 2; WIDOWS: 2; MARGIN-TOP: 12pt; LETTER-SPACING: normal; TEXT-INDENT: 4%; font-variant-ligatures: normal; font-variant-caps: normal; -webkit-text-stroke-width: 0px">
The Company is dependent on third-party manufacturers to supply
products for research and development activities in its programs.
In particular, the Company relies and expects to continue to rely
on a small number of manufacturers to supply it with its
requirements for the active pharmaceutical ingredients and
formulated drugs related to these programs. These programs could be
adversely affected by a significant interruption in the supply of
active pharmaceutical ingredients and formulated drugs.</p>
<p style="MARGIN-BOTTOM: 0px; FONT-SIZE: 1px; FONT-FAMILY: "Times New Roman"; WHITE-SPACE: normal; WORD-SPACING: 0px; TEXT-TRANSFORM: none; FONT-WEIGHT: normal; COLOR: rgb(0,0,0); FONT-STYLE: normal; ORPHANS: 2; WIDOWS: 2; MARGIN-TOP: 18px; LETTER-SPACING: normal; TEXT-INDENT: 0px; font-variant-ligatures: normal; font-variant-caps: normal; -webkit-text-stroke-width: 0px">
 </p>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; WHITE-SPACE: normal; WORD-SPACING: 0px; TEXT-TRANSFORM: none; FONT-WEIGHT: normal; COLOR: rgb(0,0,0); FONT-STYLE: normal; ORPHANS: 2; WIDOWS: 2; MARGIN-TOP: 0pt; LETTER-SPACING: normal; TEXT-INDENT: 0px; font-variant-ligatures: normal; font-variant-caps: normal; -webkit-text-stroke-width: 0px">
<b>Marketable securities</b></p>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; WHITE-SPACE: normal; WORD-SPACING: 0px; TEXT-TRANSFORM: none; FONT-WEIGHT: normal; COLOR: rgb(0,0,0); FONT-STYLE: normal; ORPHANS: 2; WIDOWS: 2; MARGIN-TOP: 6pt; LETTER-SPACING: normal; TEXT-INDENT: 4%; font-variant-ligatures: normal; font-variant-caps: normal; -webkit-text-stroke-width: 0px">
Marketable securities consist of investments with original
maturities greater than ninety days. The Company has classified its
investments with maturities beyond one year as short term, based on
their highly liquid nature and because such marketable securities
represent the investment of cash that is available for current
operations. The Company considers its investment portfolio of
investments as <font style="WHITE-SPACE: nowrap"><font style="WHITE-SPACE: nowrap">available-for-sale.</font></font> Accordingly, these investments
are recorded at fair value, which is based on quoted market prices.
Unrealized gains and losses are reported as a component of
accumulated other comprehensive income (loss) in
stockholders’ equity. Realized gains and losses and declines
in value judged to be other than temporary are included as a
component of other income (expense), net based on the specific
identification method. When determining whether a decline in value
is other than temporary, the Company considers various factors,
including whether the Company has the intent to sell the security,
and whether it is more likely than not that the Company will be
required to sell the security prior to recovery of its amortized
cost basis. Fair value is determined based on quoted market
prices.</p>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; WHITE-SPACE: normal; WORD-SPACING: 0px; TEXT-TRANSFORM: none; FONT-WEIGHT: normal; COLOR: rgb(0,0,0); FONT-STYLE: normal; ORPHANS: 2; WIDOWS: 2; MARGIN-TOP: 18pt; LETTER-SPACING: normal; TEXT-INDENT: 0px; font-variant-ligatures: normal; font-variant-caps: normal; -webkit-text-stroke-width: 0px">
<b>Deferred Offering Costs</b></p>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; WHITE-SPACE: normal; WORD-SPACING: 0px; TEXT-TRANSFORM: none; FONT-WEIGHT: normal; COLOR: rgb(0,0,0); FONT-STYLE: normal; ORPHANS: 2; WIDOWS: 2; MARGIN-TOP: 6pt; LETTER-SPACING: normal; TEXT-INDENT: 4%; font-variant-ligatures: normal; font-variant-caps: normal; -webkit-text-stroke-width: 0px">
The Company capitalizes certain legal, accounting and other
third-party fees that are directly associated with <font style="WHITE-SPACE: nowrap">in-process</font> equity financings as other
assets until such financings are consummated. After consummation of
the equity financing, these costs are recorded in
stockholders’ equity (deficit) as a reduction of
additional <font style="WHITE-SPACE: nowrap">paid-in</font> capital generated as a result
of the offering or as a reduction to the carrying value of
preferred stock issued.</p>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; WHITE-SPACE: normal; WORD-SPACING: 0px; TEXT-TRANSFORM: none; FONT-WEIGHT: normal; COLOR: rgb(0,0,0); FONT-STYLE: normal; ORPHANS: 2; WIDOWS: 2; MARGIN-TOP: 18pt; LETTER-SPACING: normal; TEXT-INDENT: 0px; font-variant-ligatures: normal; font-variant-caps: normal; -webkit-text-stroke-width: 0px">
<b>Property and Equipment</b></p>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; WHITE-SPACE: normal; WORD-SPACING: 0px; TEXT-TRANSFORM: none; FONT-WEIGHT: normal; COLOR: rgb(0,0,0); FONT-STYLE: normal; ORPHANS: 2; WIDOWS: 2; MARGIN-TOP: 6pt; LETTER-SPACING: normal; TEXT-INDENT: 4%; font-variant-ligatures: normal; font-variant-caps: normal; -webkit-text-stroke-width: 0px">
Property and equipment are stated at cost less accumulated
depreciation. Depreciation expense is recognized using the
straight-line method over a five-year estimated useful life for
equipment, furniture and fixtures and office equipment. Leasehold
improvements are amortized over the shorter of the asset life or
the term of the lease agreement. Expenditures for repairs and
maintenance of assets are charged to expense as incurred. Upon
retirement or sale, the cost and related accumulated depreciation
of assets disposed of are removed from the accounts and any
resulting gain or loss is included in loss from operations.</p>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; WHITE-SPACE: normal; WORD-SPACING: 0px; TEXT-TRANSFORM: none; FONT-WEIGHT: normal; COLOR: rgb(0,0,0); FONT-STYLE: normal; ORPHANS: 2; WIDOWS: 2; MARGIN-TOP: 18pt; LETTER-SPACING: normal; TEXT-INDENT: 0px; font-variant-ligatures: normal; font-variant-caps: normal; -webkit-text-stroke-width: 0px">
<b>Impairment of Long-Lived Assets</b></p>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; WHITE-SPACE: normal; WORD-SPACING: 0px; TEXT-TRANSFORM: none; FONT-WEIGHT: normal; COLOR: rgb(0,0,0); FONT-STYLE: normal; ORPHANS: 2; WIDOWS: 2; MARGIN-TOP: 6pt; LETTER-SPACING: normal; TEXT-INDENT: 4%; font-variant-ligatures: normal; font-variant-caps: normal; -webkit-text-stroke-width: 0px">
Long-lived assets consist of property and equipment. Long-lived
assets to be held and used are tested for recoverability whenever
events or changes in business circumstances indicate that the
carrying amount of the assets may not be fully recoverable. Factors
that the Company considers in deciding when to perform an
impairment review include significant underperformance of the
business in relation to expectations, significant negative industry
or economic trends, and significant changes or planned changes in
the use of the assets. If an impairment review is performed to
evaluate a long-lived asset for recoverability, the Company
compares forecasts of undiscounted cash flows expected to result
from the use and eventual disposition of the long-lived asset to
its carrying value. An impairment loss would be recognized when
estimated undiscounted future cash flows expected to result from
the use of an asset are less than its carrying amount. The
impairment loss would be based on the excess of the carrying value
of the impaired asset over its fair value, determined based on
discounted cash flows. To date, the Company has not recorded any
impairment losses on long-lived assets.</p>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; WHITE-SPACE: normal; WORD-SPACING: 0px; TEXT-TRANSFORM: none; FONT-WEIGHT: normal; COLOR: rgb(0,0,0); FONT-STYLE: normal; ORPHANS: 2; WIDOWS: 2; MARGIN-TOP: 18pt; LETTER-SPACING: normal; TEXT-INDENT: 0px; font-variant-ligatures: normal; font-variant-caps: normal; -webkit-text-stroke-width: 0px">
<b>Research and Development Costs</b></p>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; WHITE-SPACE: normal; WORD-SPACING: 0px; TEXT-TRANSFORM: none; FONT-WEIGHT: normal; COLOR: rgb(0,0,0); FONT-STYLE: normal; ORPHANS: 2; WIDOWS: 2; MARGIN-TOP: 6pt; LETTER-SPACING: normal; TEXT-INDENT: 4%; font-variant-ligatures: normal; font-variant-caps: normal; -webkit-text-stroke-width: 0px">
Research and development costs are expensed as incurred. Included
in research and development expenses are wages, stock-based
compensation and benefits of employees, third-party license fees
and milestones and other operational costs related to the
Company’s research and development activities, including
facility-related expenses and external costs of outside vendors
engaged to conduct <font style="WHITE-SPACE: nowrap">pre-clinical</font> studies, manufacturing
activities, and clinical trials. The Company records research and
development expenses net of any research and development tax
incentives the Company is entitled to receive from government
authorities.</p>
<p style="MARGIN-BOTTOM: 0px; FONT-SIZE: 1px; FONT-FAMILY: "Times New Roman"; WHITE-SPACE: normal; WORD-SPACING: 0px; TEXT-TRANSFORM: none; FONT-WEIGHT: normal; COLOR: rgb(0,0,0); FONT-STYLE: normal; ORPHANS: 2; WIDOWS: 2; MARGIN-TOP: 18px; LETTER-SPACING: normal; TEXT-INDENT: 0px; font-variant-ligatures: normal; font-variant-caps: normal; -webkit-text-stroke-width: 0px">
 </p>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; WHITE-SPACE: normal; WORD-SPACING: 0px; TEXT-TRANSFORM: none; FONT-WEIGHT: normal; COLOR: rgb(0,0,0); FONT-STYLE: normal; ORPHANS: 2; WIDOWS: 2; MARGIN-TOP: 0pt; LETTER-SPACING: normal; TEXT-INDENT: 0px; font-variant-ligatures: normal; font-variant-caps: normal; -webkit-text-stroke-width: 0px">
<b>Research Contract Costs and Accruals</b></p>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; WHITE-SPACE: normal; WORD-SPACING: 0px; TEXT-TRANSFORM: none; FONT-WEIGHT: normal; COLOR: rgb(0,0,0); FONT-STYLE: normal; ORPHANS: 2; WIDOWS: 2; MARGIN-TOP: 6pt; LETTER-SPACING: normal; TEXT-INDENT: 4%; font-variant-ligatures: normal; font-variant-caps: normal; -webkit-text-stroke-width: 0px">
The Company has entered into various research and development
contracts with research institutions and other companies both
inside and outside of the United States. These agreements are
generally cancelable, and related payments are recorded as research
and development expenses as incurred. The Company records accruals
for estimated ongoing research costs. When evaluating the adequacy
of the accrued liabilities, the Company analyzes progress of the
studies, including the phase or completion of events, invoices
received and contracted costs. Significant judgments and estimates
are made in determining the accrued balances at the end of any
reporting period. Actual results could differ from the
Company’s estimates. The Company’s historical accrual
estimates have not been materially different from the actual
costs.</p>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; WHITE-SPACE: normal; WORD-SPACING: 0px; TEXT-TRANSFORM: none; FONT-WEIGHT: normal; COLOR: rgb(0,0,0); FONT-STYLE: normal; ORPHANS: 2; WIDOWS: 2; MARGIN-TOP: 18pt; LETTER-SPACING: normal; TEXT-INDENT: 0px; font-variant-ligatures: normal; font-variant-caps: normal; -webkit-text-stroke-width: 0px">
<b>Patent Costs</b></p>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; WHITE-SPACE: normal; WORD-SPACING: 0px; TEXT-TRANSFORM: none; FONT-WEIGHT: normal; COLOR: rgb(0,0,0); FONT-STYLE: normal; ORPHANS: 2; WIDOWS: 2; MARGIN-TOP: 6pt; LETTER-SPACING: normal; TEXT-INDENT: 4%; font-variant-ligatures: normal; font-variant-caps: normal; -webkit-text-stroke-width: 0px">
All patent-related costs incurred in connection with filing and
prosecuting patent applications are recorded as general and
administrative expenses as incurred, as recoverability of such
expenditures is uncertain.</p>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; WHITE-SPACE: normal; WORD-SPACING: 0px; TEXT-TRANSFORM: none; FONT-WEIGHT: normal; COLOR: rgb(0,0,0); FONT-STYLE: normal; ORPHANS: 2; WIDOWS: 2; MARGIN-TOP: 18pt; LETTER-SPACING: normal; TEXT-INDENT: 0px; font-variant-ligatures: normal; font-variant-caps: normal; -webkit-text-stroke-width: 0px">
<b>Accounting for Stock-Based Compensation</b></p>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; WHITE-SPACE: normal; WORD-SPACING: 0px; TEXT-TRANSFORM: none; FONT-WEIGHT: normal; COLOR: rgb(0,0,0); FONT-STYLE: normal; ORPHANS: 2; WIDOWS: 2; MARGIN-TOP: 6pt; LETTER-SPACING: normal; TEXT-INDENT: 4%; font-variant-ligatures: normal; font-variant-caps: normal; -webkit-text-stroke-width: 0px">
The Company measures all stock options and other stock-based awards
granted to employees and directors at the fair value on the date of
the grant using the Black-Scholes option-pricing model. The fair
value of the awards is recognized as expense, net of estimated
forfeitures, over the requisite service period, which is generally
the vesting period of the respective award. The straight-line
method of expense recognition is applied to all awards with
service-only conditions.</p>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; WHITE-SPACE: normal; WORD-SPACING: 0px; TEXT-TRANSFORM: none; FONT-WEIGHT: normal; COLOR: rgb(0,0,0); FONT-STYLE: normal; ORPHANS: 2; WIDOWS: 2; MARGIN-TOP: 12pt; LETTER-SPACING: normal; TEXT-INDENT: 4%; font-variant-ligatures: normal; font-variant-caps: normal; -webkit-text-stroke-width: 0px">
For stock-based awards granted to consultants and nonemployees,
compensation expense is recognized over the period during which
services are rendered by such consultants and nonemployees until
completed. At the end of each financial reporting period prior to
completion of the service, the fair value of these awards
is <font style="WHITE-SPACE: nowrap">re-measured</font> using the then-current fair
value of the Company’s common stock and updated assumption
inputs in the Black-Scholes option-pricing model.</p>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; WHITE-SPACE: normal; WORD-SPACING: 0px; TEXT-TRANSFORM: none; FONT-WEIGHT: normal; COLOR: rgb(0,0,0); FONT-STYLE: normal; ORPHANS: 2; WIDOWS: 2; MARGIN-TOP: 12pt; LETTER-SPACING: normal; TEXT-INDENT: 4%; font-variant-ligatures: normal; font-variant-caps: normal; -webkit-text-stroke-width: 0px">
The Company classifies stock-based compensation expense in its
consolidated statement of operations and comprehensive loss in the
same manner in which the award recipient’s payroll costs are
classified or in which the award recipients’ service payments
are classified.</p>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; WHITE-SPACE: normal; WORD-SPACING: 0px; TEXT-TRANSFORM: none; FONT-WEIGHT: normal; COLOR: rgb(0,0,0); FONT-STYLE: normal; ORPHANS: 2; WIDOWS: 2; MARGIN-TOP: 12pt; LETTER-SPACING: normal; TEXT-INDENT: 4%; font-variant-ligatures: normal; font-variant-caps: normal; -webkit-text-stroke-width: 0px">
The Company recognizes compensation expense for only the portion of
awards that are expected to vest. In developing a forfeiture rate
estimate, the Company has considered its historical experience to
estimate <font style="WHITE-SPACE: nowrap">pre-vesting</font> forfeitures for service-based
awards.</p>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; WHITE-SPACE: normal; WORD-SPACING: 0px; TEXT-TRANSFORM: none; FONT-WEIGHT: normal; COLOR: rgb(0,0,0); FONT-STYLE: normal; ORPHANS: 2; WIDOWS: 2; MARGIN-TOP: 18pt; LETTER-SPACING: normal; TEXT-INDENT: 0px; font-variant-ligatures: normal; font-variant-caps: normal; -webkit-text-stroke-width: 0px">
<b>Income Taxes</b></p>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; WHITE-SPACE: normal; WORD-SPACING: 0px; TEXT-TRANSFORM: none; FONT-WEIGHT: normal; COLOR: rgb(0,0,0); FONT-STYLE: normal; ORPHANS: 2; WIDOWS: 2; MARGIN-TOP: 6pt; LETTER-SPACING: normal; TEXT-INDENT: 4%; font-variant-ligatures: normal; font-variant-caps: normal; -webkit-text-stroke-width: 0px">
The Company accounts for income taxes using the asset and liability
method, which requires the recognition of deferred tax assets and
liabilities for the expected future tax consequences of events that
have been recognized in the consolidated financial statements or in
the Company’s tax returns. Deferred taxes are determined
based on the difference between the financial statement and tax
basis of assets and liabilities using enacted tax rates in effect
in the years in which the differences are expected to reverse.
Changes in deferred tax assets and liabilities are recorded in the
provision for income taxes. The Company assesses the likelihood
that its deferred tax assets will be recovered from future taxable
income and, to the extent it believes, based upon the weight of
available evidence, that it is more likely than not that all or a
portion of deferred tax assets will not be realized, a valuation
allowance is established through a charge to income tax expense.
Potential for recovery of deferred tax assets is evaluated by
estimating the future taxable profits expected and considering
prudent and feasible tax planning strategies.</p>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; WHITE-SPACE: normal; WORD-SPACING: 0px; TEXT-TRANSFORM: none; FONT-WEIGHT: normal; COLOR: rgb(0,0,0); FONT-STYLE: normal; ORPHANS: 2; WIDOWS: 2; MARGIN-TOP: 12pt; LETTER-SPACING: normal; TEXT-INDENT: 4%; font-variant-ligatures: normal; font-variant-caps: normal; -webkit-text-stroke-width: 0px">
The Company accounts for uncertainty in income taxes recognized in
the consolidated financial statements by applying a <font style="WHITE-SPACE: nowrap">two-step</font> process to determine the
amount of tax benefit to be recognized. First, the tax position
must be evaluated to determine the likelihood that it will be
sustained upon external examination by the taxing authorities. If
the tax position is deemed<font style="WHITE-SPACE: nowrap">more-likely-than-not</font> to be sustained, the tax
position is then assessed to determine the amount of benefit to
recognize in the consolidated financial statements. The amount of
the benefit that may be recognized is the largest amount that has a
greater than 50% likelihood of being realized upon ultimate
settlement. The provision for income taxes includes the effects of
any resulting tax reserves, or unrecognized tax benefits, that are
considered appropriate as well as the related net interest and
penalties.</p>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; WHITE-SPACE: normal; WORD-SPACING: 0px; TEXT-TRANSFORM: none; FONT-WEIGHT: normal; COLOR: rgb(0,0,0); FONT-STYLE: normal; ORPHANS: 2; WIDOWS: 2; MARGIN-TOP: 18pt; LETTER-SPACING: normal; TEXT-INDENT: 0px; font-variant-ligatures: normal; font-variant-caps: normal; -webkit-text-stroke-width: 0px">
<b>Segment Data</b></p>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; WHITE-SPACE: normal; WORD-SPACING: 0px; TEXT-TRANSFORM: none; FONT-WEIGHT: normal; COLOR: rgb(0,0,0); FONT-STYLE: normal; ORPHANS: 2; WIDOWS: 2; MARGIN-TOP: 6pt; LETTER-SPACING: normal; TEXT-INDENT: 4%; font-variant-ligatures: normal; font-variant-caps: normal; -webkit-text-stroke-width: 0px">
The Company manages its operations as a single segment for the
purposes of assessing performance and making operating decisions.
The Company’s singular focus is on advancing novel
therapeutics for patients suffering from type 2 diabetes, severe
obesity and obesity-related disorders. No revenue has been
generated since inception, and all tangible assets are held in the
United States.</p>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; WHITE-SPACE: normal; WORD-SPACING: 0px; TEXT-TRANSFORM: none; FONT-WEIGHT: normal; COLOR: rgb(0,0,0); FONT-STYLE: normal; ORPHANS: 2; WIDOWS: 2; MARGIN-TOP: 18pt; LETTER-SPACING: normal; TEXT-INDENT: 0px; font-variant-ligatures: normal; font-variant-caps: normal; -webkit-text-stroke-width: 0px">
<b>Comprehensive Loss</b></p>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; WHITE-SPACE: normal; WORD-SPACING: 0px; TEXT-TRANSFORM: none; FONT-WEIGHT: normal; COLOR: rgb(0,0,0); FONT-STYLE: normal; ORPHANS: 2; WIDOWS: 2; MARGIN-TOP: 6pt; LETTER-SPACING: normal; TEXT-INDENT: 4%; font-variant-ligatures: normal; font-variant-caps: normal; -webkit-text-stroke-width: 0px">
Comprehensive loss includes net loss as well as other changes in
stockholders’ equity (deficit) that result from transactions
and economic events other than those with stockholders. For the
years ended December 31, 2016, 2015 and 2014, the
Company’s only element of other comprehensive loss was
unrealized gain or loss on marketable securities.</p>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; WHITE-SPACE: normal; WORD-SPACING: 0px; TEXT-TRANSFORM: none; FONT-WEIGHT: normal; COLOR: rgb(0,0,0); FONT-STYLE: normal; ORPHANS: 2; WIDOWS: 2; MARGIN-TOP: 18pt; LETTER-SPACING: normal; TEXT-INDENT: 0px; font-variant-ligatures: normal; font-variant-caps: normal; -webkit-text-stroke-width: 0px">
<b>Net Income (Loss) Per Share</b></p>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; WHITE-SPACE: normal; WORD-SPACING: 0px; TEXT-TRANSFORM: none; FONT-WEIGHT: normal; COLOR: rgb(0,0,0); FONT-STYLE: normal; ORPHANS: 2; WIDOWS: 2; MARGIN-TOP: 6pt; LETTER-SPACING: normal; TEXT-INDENT: 4%; font-variant-ligatures: normal; font-variant-caps: normal; -webkit-text-stroke-width: 0px">
Upon the closing of the Company’s IPO in June 2014, all of
the Company’s outstanding redeemable convertible preferred
shares were converted into shares of common stock. Prior to this
conversion, the Company followed the <font style="WHITE-SPACE: nowrap">two-class</font> method when computing net
income (loss) per share as the Company had issued shares that meet
the definition of participating securities. The <font style="WHITE-SPACE: nowrap">two-class</font> method determines net income
(loss) per share for each class of common and participating
securities according to dividends declared or accumulated and
participation rights in undistributed earnings. The <font style="WHITE-SPACE: nowrap">two-class</font> method requires income
available to common stockholders for the period to be allocated
between common and participating securities based upon their
respective rights to receive dividends as if all income for the
period had been distributed. The Company’s redeemable
convertible preferred shares contractually entitled the holders of
such shares to participate in dividends, but did not contractually
require the holders of such shares to participate in losses of the
Company. Accordingly, the <font style="WHITE-SPACE: nowrap">two-class</font> method did not apply for
periods in which the Company reported a net loss or a net loss
attributable to common stockholders resulting from dividends or
accretion related to its redeemable convertible preferred
shares.</p>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; WHITE-SPACE: normal; WORD-SPACING: 0px; TEXT-TRANSFORM: none; FONT-WEIGHT: normal; COLOR: rgb(0,0,0); FONT-STYLE: normal; ORPHANS: 2; WIDOWS: 2; MARGIN-TOP: 12pt; LETTER-SPACING: normal; TEXT-INDENT: 4%; font-variant-ligatures: normal; font-variant-caps: normal; -webkit-text-stroke-width: 0px">
Basic net income (loss) per share is computed by dividing the net
income (loss) attributable to common stockholders by the weighted
average number of common shares outstanding for the period. Diluted
net income (loss) per share attributable to common stockholders is
computed by dividing the diluted net income (loss) attributable to
common stockholders by the weighted average number of common
shares, including potential dilutive common shares assuming the
dilutive effect of outstanding stock options and unvested
restricted common shares, as determined using the treasury stock
method. For periods in which the Company has reported net losses,
diluted net loss per common share attributable to common
stockholders is the same as basic net loss per common share
attributable to common stockholders, since dilutive common shares
are not assumed to have been issued if their effect is
antidilutive.</p>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; WHITE-SPACE: normal; WORD-SPACING: 0px; TEXT-TRANSFORM: none; FONT-WEIGHT: normal; COLOR: rgb(0,0,0); FONT-STYLE: normal; ORPHANS: 2; WIDOWS: 2; MARGIN-TOP: 18pt; LETTER-SPACING: normal; TEXT-INDENT: 0px; font-variant-ligatures: normal; font-variant-caps: normal; -webkit-text-stroke-width: 0px">
<b>Recently Issued and Adopted Accounting Pronouncements</b></p>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; WHITE-SPACE: normal; WORD-SPACING: 0px; TEXT-TRANSFORM: none; FONT-WEIGHT: normal; COLOR: rgb(0,0,0); FONT-STYLE: normal; ORPHANS: 2; WIDOWS: 2; MARGIN-TOP: 6pt; LETTER-SPACING: normal; TEXT-INDENT: 4%; font-variant-ligatures: normal; font-variant-caps: normal; -webkit-text-stroke-width: 0px">
In May 2014, the Financial Accounting Standards Board (the
“FASB”) issued ASU <font style="WHITE-SPACE: nowrap">No. 2014-09,</font> <i>Revenue from Contracts with
Customers</i> (Topic 606), which supersedes
all existing revenue recognition requirements, including most
industry-specific guidance. The new standard requires a company to
recognize revenue when it transfers goods or services to customers
in an amount that reflects the consideration that the company
expects to receive for those goods or services. The FASB has
continued to issue accounting standards updates to clarify and
provide implementation guidance related to Revenue from Contracts
with Customers, including ASU <font style="WHITE-SPACE: nowrap">2016-08</font><i>, Revenue from Contract with
Customers: Principal versus Agent Considerations</i>,
ASU <font style="WHITE-SPACE: nowrap">2016-10,</font> <i>Revenue from Contracts with
Customers: Identifying Performance Obligations and Licensing</i>,
and ASU <font style="WHITE-SPACE: nowrap">2016-12,</font> <i>Revenue
from Contracts with Customers: Narrow-Scope Improvements and
Practical Expedients. </i>These amendments address a
number of areas, including the entity’s identification of its
performance obligations in a contract, collectability, <font style="WHITE-SPACE: nowrap">non-cash</font> consideration, presentation of
sales tax and an entity’s evaluation of the nature of its
promise to grant a license of intellectual property and whether or
not that revenue is recognized over time or at a point in time.
These new standards will be effective for the Company beginning
January 1, 2018. The Company could early adopt the standard
for the year ending December 31, 2017. The Company plans to
early adopt the standard as of January 1, 2017, although there
is no impact of this new guidance on its consolidated financial
statements as it does not currently have any revenue generating
arrangements.</p>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; WHITE-SPACE: normal; WORD-SPACING: 0px; TEXT-TRANSFORM: none; FONT-WEIGHT: normal; COLOR: rgb(0,0,0); FONT-STYLE: normal; ORPHANS: 2; WIDOWS: 2; MARGIN-TOP: 12pt; LETTER-SPACING: normal; TEXT-INDENT: 4%; font-variant-ligatures: normal; font-variant-caps: normal; -webkit-text-stroke-width: 0px">
In August 2014, the FASB issued ASU <font style="WHITE-SPACE: nowrap">No. 2014-15,</font> <i>Presentation of Financial
Statements—Going Concern</i>. The new guidance addresses
management’s responsibility to evaluate whether there is
substantial doubt about an entity’s ability to continue as a
going concern and to provide related footnote disclosures.
Management’s evaluation should be based on relevant
conditions and events that are known and reasonably knowable at the
date that the financial statements are issued. The standard was
effective for the annual reporting period ending after
December 15, 2016, and for annual and interim periods
thereafter. The adoption of this guidance did not have a material
impact on the Company’s consolidated financial statements and
related disclosures.</p>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; WHITE-SPACE: normal; WORD-SPACING: 0px; TEXT-TRANSFORM: none; FONT-WEIGHT: normal; COLOR: rgb(0,0,0); FONT-STYLE: normal; ORPHANS: 2; WIDOWS: 2; MARGIN-TOP: 12pt; LETTER-SPACING: normal; TEXT-INDENT: 4%; font-variant-ligatures: normal; font-variant-caps: normal; -webkit-text-stroke-width: 0px">
In November 2015, the FASB issued ASU <font style="WHITE-SPACE: nowrap">No. 2015-17,</font> <i>Balance Sheet
Classification of Deferred Taxes.</i> This guidance requires
companies to classify all deferred tax assets and liabilities as
noncurrent on the balance sheet instead of separating deferred
taxes into current and noncurrent amounts. This guidance allows for
adoption on either a prospective or retrospective basis and will be
effective on January 1, 2017. Early adoption is permitted. The
Company elected to early adopt this guidance on December 31,
2015. The adoption of this guidance did not have a material impact
on the Company’s consolidated financial statements and
related disclosures.</p>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; WHITE-SPACE: normal; WORD-SPACING: 0px; TEXT-TRANSFORM: none; FONT-WEIGHT: normal; COLOR: rgb(0,0,0); FONT-STYLE: normal; ORPHANS: 2; WIDOWS: 2; MARGIN-TOP: 12pt; LETTER-SPACING: normal; TEXT-INDENT: 4%; font-variant-ligatures: normal; font-variant-caps: normal; -webkit-text-stroke-width: 0px">
In February 2016, the FASB issued ASU <font style="WHITE-SPACE: nowrap">No. 2016-02,</font> <i>Leases</i>. This guidance
will require that lease arrangements longer than 12 months result
in an entity recognizing an asset and liability equal to the
present value of the lease payments in the statement of financial
position. This guidance is effective for annual periods beginning
after December 15, 2018, and interim periods therein. This
standard requires a modified retrospective transition approach for
all leases existing at, or entered into after, the date of initial
application, with an option to use certain transition relief. Early
adoption is permitted. The Company is evaluating the effect that
this guidance will have on its consolidated financial
statements.</p>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; WHITE-SPACE: normal; WORD-SPACING: 0px; TEXT-TRANSFORM: none; FONT-WEIGHT: normal; COLOR: rgb(0,0,0); FONT-STYLE: normal; ORPHANS: 2; WIDOWS: 2; MARGIN-TOP: 12pt; LETTER-SPACING: normal; TEXT-INDENT: 4%; font-variant-ligatures: normal; font-variant-caps: normal; -webkit-text-stroke-width: 0px">
In March 2016, the FASB issued ASU <font style="WHITE-SPACE: nowrap">No. 2016-09,</font> <i>Improvements to Employee
Share-Based Payment Accounting</i>. This guidance involves several
aspects of the accounting for share-based payment transactions,
including the income tax consequences, classification of awards as
either equity or liabilities and classification on the statement of
cash flows. This guidance allows for adoption on either a
prospective or retrospective basis and will be effective on
January 1, 2017. Early adoption is permitted. The adoption of
this guidance will have no impact on the Company’s
consolidated financial statements.</p>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; WHITE-SPACE: normal; WORD-SPACING: 0px; TEXT-TRANSFORM: none; FONT-WEIGHT: normal; COLOR: rgb(0,0,0); FONT-STYLE: normal; ORPHANS: 2; WIDOWS: 2; MARGIN-TOP: 12pt; LETTER-SPACING: normal; TEXT-INDENT: 4%; font-variant-ligatures: normal; font-variant-caps: normal; -webkit-text-stroke-width: 0px">
In August 2016, the FASB issued ASU <font style="WHITE-SPACE: nowrap">No. 2016-15,</font> <i>Statement of Cash Flows:
Classification of Certain Cash Receipts and Cash Payments</i>. This
guidance addresses the presentation and classification of certain
cash receipts and cash payments in the statement of cash flows. The
standard will be effective for annual periods beginning after
December 15, 2017, and interim periods therein. Early adoption
is permitted. The Company is evaluating the effect that this
guidance will have on its consolidated financial statements.</p>
<p style="MARGIN-BOTTOM: 0px; FONT-SIZE: 1px; FONT-FAMILY: "Times New Roman"; WHITE-SPACE: normal; WORD-SPACING: 0px; TEXT-TRANSFORM: none; FONT-WEIGHT: normal; COLOR: rgb(0,0,0); FONT-STYLE: normal; ORPHANS: 2; WIDOWS: 2; MARGIN-TOP: 18px; LETTER-SPACING: normal; TEXT-INDENT: 0px; font-variant-ligatures: normal; font-variant-caps: normal; -webkit-text-stroke-width: 0px">
 </p>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; WHITE-SPACE: normal; WORD-SPACING: 0px; TEXT-TRANSFORM: none; FONT-WEIGHT: normal; COLOR: rgb(0,0,0); FONT-STYLE: normal; ORPHANS: 2; WIDOWS: 2; MARGIN-TOP: 0pt; LETTER-SPACING: normal; TEXT-INDENT: 0px; font-variant-ligatures: normal; font-variant-caps: normal; -webkit-text-stroke-width: 0px">
<b>Reclassifications</b></p>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; WHITE-SPACE: normal; WORD-SPACING: 0px; TEXT-TRANSFORM: none; FONT-WEIGHT: normal; COLOR: rgb(0,0,0); FONT-STYLE: normal; ORPHANS: 2; WIDOWS: 2; MARGIN-TOP: 6pt; LETTER-SPACING: normal; TEXT-INDENT: 4%; font-variant-ligatures: normal; font-variant-caps: normal; -webkit-text-stroke-width: 0px">
Prior period financial statement amounts have been reclassified to
conform to current period presentation.</p>
</div>
ZFGN
39936000
<div>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-TOP: 18pt">
<b>Research and Development Costs</b></p>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-TOP: 6pt; TEXT-INDENT: 4%">
Research and development costs are expensed as incurred. Included
in research and development expenses are wages, stock-based
compensation and benefits of employees, third-party license fees
and milestones and other operational costs related to the
Company’s research and development activities, including
facility-related expenses and external costs of outside vendors
engaged to conduct <font style="WHITE-SPACE: nowrap">pre-clinical</font> studies, manufacturing
activities, and clinical trials. The Company records research and
development expenses net of any research and development tax
incentives the Company is entitled to receive from government
authorities.</p>
</div>
<div>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-TOP: 18pt">
<b>15. Quarterly Financial Data (Unaudited)</b></p>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-TOP: 6pt; TEXT-INDENT: 4%">
The following information has been derived from unaudited
consolidated financial statements that, in the opinion of
management, include all recurring adjustments necessary for a fair
statement of such information.</p>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 12pt; MARGIN-TOP: 0pt">
 </p>
<table style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; BORDER-COLLAPSE: collapse" cellspacing="0" cellpadding="0" width="92%" align="center" border="0">
<tr>
<td width="43%"></td>
<td valign="bottom" width="10%"></td>
<td></td>
<td></td>
<td></td>
<td valign="bottom" width="9%"></td>
<td></td>
<td></td>
<td></td>
<td valign="bottom" width="9%"></td>
<td></td>
<td></td>
<td></td>
<td valign="bottom" width="9%"></td>
<td></td>
<td></td>
<td></td>
</tr>
<tr style="FONT-SIZE: 8pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid">
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td style="BORDER-BOTTOM: #000000 1pt solid" valign="bottom" colspan="14" align="center"><b>Three Months Ended</b></td>
<td valign="bottom"> </td>
</tr>
<tr style="FONT-SIZE: 8pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid">
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td valign="bottom" colspan="2" align="center">
<b>March 31,</b></td>
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td valign="bottom" colspan="2" align="center">
<b>June 30,</b></td>
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td valign="bottom" colspan="2" align="center">
<b>September 30,</b></td>
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td valign="bottom" colspan="2" align="center">
<b>December 31,</b></td>
<td valign="bottom"> </td>
</tr>
<tr style="FONT-SIZE: 8pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid">
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td style="BORDER-BOTTOM: #000000 1pt solid" valign="bottom" colspan="2" align="center"><b>2016</b></td>
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td style="BORDER-BOTTOM: #000000 1pt solid" valign="bottom" colspan="2" align="center"><b>2016</b></td>
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td style="BORDER-BOTTOM: #000000 1pt solid" valign="bottom" colspan="2" align="center"><b>2016</b></td>
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td style="BORDER-BOTTOM: #000000 1pt solid" valign="bottom" colspan="2" align="center"><b>2016</b></td>
<td valign="bottom"> </td>
</tr>
<tr style="FONT-SIZE: 8pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid">
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td valign="bottom" colspan="14" align="center"><b>(in thousands,
except per share data)</b></td>
<td valign="bottom"> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid" bgcolor="#CCEEFF">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-LEFT: 1em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Revenue</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom" nowrap="nowrap">$</td>
<td valign="bottom" nowrap="nowrap" align="right">
—  </td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom" nowrap="nowrap">$</td>
<td valign="bottom" nowrap="nowrap" align="right">
—  </td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom" nowrap="nowrap">$</td>
<td valign="bottom" nowrap="nowrap" align="right">
—  </td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom" nowrap="nowrap">$</td>
<td valign="bottom" nowrap="nowrap" align="right">
—  </td>
<td valign="bottom" nowrap="nowrap"> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-LEFT: 1em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Operating expenses</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">17,857</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">15,062</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">14,831</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">10,475</td>
<td valign="bottom" nowrap="nowrap"> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid" bgcolor="#CCEEFF">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-LEFT: 1em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Net loss</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">(17,736</td>
<td valign="bottom" nowrap="nowrap">) </td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">(15,028</td>
<td valign="bottom" nowrap="nowrap">) </td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">(14,675</td>
<td valign="bottom" nowrap="nowrap">) </td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">(10,439</td>
<td valign="bottom" nowrap="nowrap">) </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-LEFT: 1em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Net loss per share, basic and diluted</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom">$</td>
<td valign="bottom" align="right">(0.65</td>
<td valign="bottom" nowrap="nowrap">) </td>
<td valign="bottom">  </td>
<td valign="bottom">$</td>
<td valign="bottom" align="right">(0.55</td>
<td valign="bottom" nowrap="nowrap">) </td>
<td valign="bottom">  </td>
<td valign="bottom">$</td>
<td valign="bottom" align="right">(0.54</td>
<td valign="bottom" nowrap="nowrap">) </td>
<td valign="bottom">  </td>
<td valign="bottom">$</td>
<td valign="bottom" align="right">(0.38</td>
<td valign="bottom" nowrap="nowrap">) </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid" bgcolor="#CCEEFF">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-LEFT: 1em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Weighted average common shares outstanding, basic and diluted</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">27,263,435</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">27,272,225</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">27,322,907</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">27,332,515</td>
<td valign="bottom" nowrap="nowrap"> </td>
</tr>
<tr style="FONT-SIZE: 1pt">
<td height="16"></td>
<td height="16" colspan="16"></td>
</tr>
<tr style="FONT-SIZE: 8pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid">
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td style="BORDER-BOTTOM: #000000 1pt solid" valign="bottom" colspan="14" align="center"><b>Three Months Ended</b></td>
<td valign="bottom"> </td>
</tr>
<tr style="FONT-SIZE: 8pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid">
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td valign="bottom" colspan="2" align="center">
<b>March 31,</b></td>
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td valign="bottom" colspan="2" align="center">
<b>June 30,</b></td>
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td valign="bottom" colspan="2" align="center">
<b>September 30,</b></td>
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td valign="bottom" colspan="2" align="center">
<b>December 31,</b></td>
<td valign="bottom"> </td>
</tr>
<tr style="FONT-SIZE: 8pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid">
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td style="BORDER-BOTTOM: #000000 1pt solid" valign="bottom" colspan="2" align="center"><b>2015</b></td>
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td style="BORDER-BOTTOM: #000000 1pt solid" valign="bottom" colspan="2" align="center"><b>2015</b></td>
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td style="BORDER-BOTTOM: #000000 1pt solid" valign="bottom" colspan="2" align="center"><b>2015</b></td>
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td style="BORDER-BOTTOM: #000000 1pt solid" valign="bottom" colspan="2" align="center"><b>2015</b></td>
<td valign="bottom"> </td>
</tr>
<tr style="FONT-SIZE: 8pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid">
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td valign="bottom" colspan="14" align="center"><b>(in thousands,
except per share data)</b></td>
<td valign="bottom"> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid" bgcolor="#CCEEFF">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-LEFT: 1em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Revenue</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom" nowrap="nowrap">$</td>
<td valign="bottom" nowrap="nowrap" align="right">
—  </td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom" nowrap="nowrap">$</td>
<td valign="bottom" nowrap="nowrap" align="right">
—  </td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom" nowrap="nowrap">$</td>
<td valign="bottom" nowrap="nowrap" align="right">
—  </td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom" nowrap="nowrap">$</td>
<td valign="bottom" nowrap="nowrap" align="right">
—  </td>
<td valign="bottom" nowrap="nowrap"> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-LEFT: 1em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Operating expenses</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">13,240</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">17,610</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">19,717</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">23,246</td>
<td valign="bottom" nowrap="nowrap"> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid" bgcolor="#CCEEFF">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-LEFT: 1em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Net loss</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">(13,472</td>
<td valign="bottom" nowrap="nowrap">) </td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">(17,756</td>
<td valign="bottom" nowrap="nowrap">) </td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">(19,884</td>
<td valign="bottom" nowrap="nowrap">) </td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">(23,174</td>
<td valign="bottom" nowrap="nowrap">) </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-LEFT: 1em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Net loss per share, basic and diluted</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom">$</td>
<td valign="bottom" align="right">(0.53</td>
<td valign="bottom" nowrap="nowrap">) </td>
<td valign="bottom">  </td>
<td valign="bottom">$</td>
<td valign="bottom" align="right">(0.66</td>
<td valign="bottom" nowrap="nowrap">) </td>
<td valign="bottom">  </td>
<td valign="bottom">$</td>
<td valign="bottom" align="right">(0.73</td>
<td valign="bottom" nowrap="nowrap">) </td>
<td valign="bottom">  </td>
<td valign="bottom">$</td>
<td valign="bottom" align="right">(0.85</td>
<td valign="bottom" nowrap="nowrap">) </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid" bgcolor="#CCEEFF">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-LEFT: 1em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Weighted average common shares outstanding, basic and diluted</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">25,615,282</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">27,011,960</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">27,138,667</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">27,238,079</td>
<td valign="bottom" nowrap="nowrap"> </td>
</tr>
</table>
</div>
<div>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-TOP: 6pt; TEXT-INDENT: 4%">
Related to these license agreements, the Company recorded research
and development expenses in its consolidated statements of
operations as follows:</p>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 12pt; MARGIN-TOP: 0pt">
 </p>
<table style="FONT-SIZE: 8pt; FONT-FAMILY: Times New Roman; BORDER-COLLAPSE: collapse" cellspacing="0" cellpadding="0" width="84%" align="center" border="0">
<tr>
<td width="74%"></td>
<td valign="bottom" width="5%"></td>
<td></td>
<td></td>
<td></td>
<td valign="bottom" width="5%"></td>
<td></td>
<td></td>
<td></td>
<td valign="bottom" width="5%"></td>
<td></td>
<td></td>
<td></td>
</tr>
<tr style="FONT-SIZE: 8pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid">
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td style="BORDER-BOTTOM: #000000 1pt solid" valign="bottom" colspan="10" align="center">
<b>Year Ended December 31,</b></td>
<td valign="bottom"> </td>
</tr>
<tr style="FONT-SIZE: 8pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid">
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td style="BORDER-BOTTOM: #000000 1pt solid" valign="bottom" colspan="2" align="center"><b>2016</b></td>
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td style="BORDER-BOTTOM: #000000 1pt solid" valign="bottom" colspan="2" align="center"><b>2015</b></td>
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td style="BORDER-BOTTOM: #000000 1pt solid" valign="bottom" colspan="2" align="center"><b>2014</b></td>
<td valign="bottom"> </td>
</tr>
<tr style="FONT-SIZE: 8pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid">
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td valign="bottom" colspan="10" align="center"><b>(in
thousands)</b></td>
<td valign="bottom"> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid" bgcolor="#CCEEFF">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-LEFT: 1em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
License, milestone, and license maintenance fees</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom" nowrap="nowrap">$</td>
<td valign="bottom" nowrap="nowrap" align="right">
—  </td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom" nowrap="nowrap">$</td>
<td valign="bottom" nowrap="nowrap" align="right">
—  </td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom">$</td>
<td valign="bottom" align="right">7,019</td>
<td valign="bottom" nowrap="nowrap"> </td>
</tr>
<tr style="FONT-SIZE: 1px">
<td valign="bottom"></td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid">
<td valign="top"></td>
<td valign="bottom">  </td>
<td valign="bottom" nowrap="nowrap">$</td>
<td valign="bottom" nowrap="nowrap" align="right">
—  </td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom" nowrap="nowrap">$</td>
<td valign="bottom" nowrap="nowrap" align="right">
—  </td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom">$</td>
<td valign="bottom" align="right">7,019</td>
<td valign="bottom" nowrap="nowrap"> </td>
</tr>
<tr style="FONT-SIZE: 1px">
<td valign="bottom"></td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
</tr>
</table>
</div>
<div>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-TOP: 6pt; TEXT-INDENT: 4%">
Accrued expenses consisted of the following as of December 31,
2016 and 2015:</p>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 12pt; MARGIN-TOP: 0pt">
 </p>
<table style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; BORDER-COLLAPSE: collapse" cellspacing="0" cellpadding="0" width="76%" align="center" border="0">
<tr>
<td width="76%"></td>
<td valign="bottom" width="6%"></td>
<td></td>
<td></td>
<td></td>
<td valign="bottom" width="6%"></td>
<td></td>
<td></td>
<td></td>
</tr>
<tr style="FONT-SIZE: 8pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid">
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td style="BORDER-BOTTOM: #000000 1pt solid" valign="bottom" colspan="6" align="center"><b>December 31,</b></td>
<td valign="bottom"> </td>
</tr>
<tr style="FONT-SIZE: 8pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid">
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td style="BORDER-BOTTOM: #000000 1pt solid" valign="bottom" colspan="2" align="center"><b>2016</b></td>
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td style="BORDER-BOTTOM: #000000 1pt solid" valign="bottom" colspan="2" align="center"><b>2015</b></td>
<td valign="bottom"> </td>
</tr>
<tr style="FONT-SIZE: 8pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid">
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td valign="bottom" colspan="6" align="center"><b>(in
thousands)</b></td>
<td valign="bottom"> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid" bgcolor="#CCEEFF">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-LEFT: 1em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Accrued payroll and related expenses</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom">$</td>
<td valign="bottom" align="right">2,008</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom">$</td>
<td valign="bottom" align="right">1,802</td>
<td valign="bottom" nowrap="nowrap"> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-LEFT: 1em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Accrued research and development expenses</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">892</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">3,727</td>
<td valign="bottom" nowrap="nowrap"> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid" bgcolor="#CCEEFF">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-LEFT: 1em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Accrued restructuring</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">376</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom" nowrap="nowrap" align="right">
—  </td>
<td valign="bottom" nowrap="nowrap"> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-LEFT: 1em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Accrued professional fees</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">347</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">422</td>
<td valign="bottom" nowrap="nowrap"> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid" bgcolor="#CCEEFF">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-LEFT: 1em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Accrued other</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">110</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">161</td>
<td valign="bottom" nowrap="nowrap"> </td>
</tr>
<tr style="FONT-SIZE: 1px">
<td valign="bottom"></td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid">
<td valign="top"></td>
<td valign="bottom">  </td>
<td valign="bottom">$</td>
<td valign="bottom" align="right">3,733</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom">$</td>
<td valign="bottom" align="right">6,112</td>
<td valign="bottom" nowrap="nowrap"> </td>
</tr>
<tr style="FONT-SIZE: 1px">
<td valign="bottom"></td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
</tr>
</table>
</div>
0.87
200000
<div>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; WHITE-SPACE: normal; WORD-SPACING: 0px; TEXT-TRANSFORM: none; FONT-WEIGHT: normal; COLOR: rgb(0,0,0); FONT-STYLE: normal; ORPHANS: 2; WIDOWS: 2; MARGIN-TOP: 18pt; LETTER-SPACING: normal; TEXT-INDENT: 0px; font-variant-ligatures: normal; font-variant-caps: normal; -webkit-text-stroke-width: 0px">
<b>14. Restructuring</b></p>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; WHITE-SPACE: normal; WORD-SPACING: 0px; TEXT-TRANSFORM: none; FONT-WEIGHT: normal; COLOR: rgb(0,0,0); FONT-STYLE: normal; ORPHANS: 2; WIDOWS: 2; MARGIN-TOP: 6pt; LETTER-SPACING: normal; TEXT-INDENT: 4%; font-variant-ligatures: normal; font-variant-caps: normal; -webkit-text-stroke-width: 0px">
On July 19, 2016, the Company announced that following a
comprehensive review of its assets and clinical programs, as well
as feedback from regulatory authorities, the Company refocused its
resources on development of a differentiated second-generation
MetAP2 inhibitor, <font style="WHITE-SPACE: nowrap">ZGN-1061.</font> As part of the strategic
restructuring, the Company reorganized its operations to align with
its new priorities focused on <font style="WHITE-SPACE: nowrap">ZGN-1061</font> development. The
Company’s workforce was reduced by approximately 31% as of
December 2016.</p>
<p style="MARGIN-BOTTOM: 0px; FONT-SIZE: 1px; FONT-FAMILY: "Times New Roman"; WHITE-SPACE: normal; WORD-SPACING: 0px; TEXT-TRANSFORM: none; FONT-WEIGHT: normal; COLOR: rgb(0,0,0); FONT-STYLE: normal; ORPHANS: 2; WIDOWS: 2; MARGIN-TOP: 12px; LETTER-SPACING: normal; TEXT-INDENT: 0px; font-variant-ligatures: normal; font-variant-caps: normal; -webkit-text-stroke-width: 0px">
 </p>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; WHITE-SPACE: normal; WORD-SPACING: 0px; TEXT-TRANSFORM: none; FONT-WEIGHT: normal; COLOR: rgb(0,0,0); FONT-STYLE: normal; ORPHANS: 2; WIDOWS: 2; MARGIN-TOP: 0pt; LETTER-SPACING: normal; TEXT-INDENT: 4%; font-variant-ligatures: normal; font-variant-caps: normal; -webkit-text-stroke-width: 0px">
During the year ended December 31, 2016, the Company recorded
$1.4 million of restructuring-related costs in operating
expense, including employee severance, benefits and related costs,
as well as a stock option modification. The stock option
modification was a <font style="WHITE-SPACE: nowrap">one-time,</font> <font style="WHITE-SPACE: nowrap">non-cash</font> expense of $0.2 million
and is included in the stock-based compensation expense line items
of both the consolidated statements of cash flows and the
consolidated statements of changes in redeemable convertible
preferred stock and stockholders’ equity (deficit) as of
December 31, 2016. The Company does not expect to incur any
additional significant costs associated with this
restructuring.</p>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; WHITE-SPACE: normal; WORD-SPACING: 0px; TEXT-TRANSFORM: none; FONT-WEIGHT: normal; COLOR: rgb(0,0,0); FONT-STYLE: normal; ORPHANS: 2; WIDOWS: 2; MARGIN-TOP: 12pt; LETTER-SPACING: normal; TEXT-INDENT: 4%; font-variant-ligatures: normal; font-variant-caps: normal; -webkit-text-stroke-width: 0px">
The following table summarizes the restructuring costs by category
for the periods indicated:</p>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 12pt; FONT-FAMILY: "Times New Roman"; WHITE-SPACE: normal; WORD-SPACING: 0px; TEXT-TRANSFORM: none; FONT-WEIGHT: normal; COLOR: rgb(0,0,0); FONT-STYLE: normal; ORPHANS: 2; WIDOWS: 2; MARGIN-TOP: 0pt; LETTER-SPACING: normal; TEXT-INDENT: 0px; font-variant-ligatures: normal; font-variant-caps: normal; -webkit-text-stroke-width: 0px">
 </p>
<table style="FONT-SIZE: 8pt; FONT-FAMILY: "Times New Roman"; WORD-SPACING: 0px; BORDER-COLLAPSE: collapse; TEXT-TRANSFORM: none; ORPHANS: 2; WIDOWS: 2; LETTER-SPACING: normal; TEXT-INDENT: 0px; -webkit-text-stroke-width: 0px" cellspacing="0" cellpadding="0" width="84%" align="center" border="0">
<tr>
<td width="69%"></td>
<td valign="bottom" width="6%"></td>
<td></td>
<td></td>
<td></td>
<td valign="bottom" width="6%"></td>
<td></td>
<td></td>
<td></td>
<td valign="bottom" width="6%"></td>
<td></td>
<td></td>
<td></td>
</tr>
<tr style="FONT-SIZE: 8pt; FONT-FAMILY: "Times New Roman"; break-inside: avoid">
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td style="BORDER-BOTTOM: rgb(0,0,0) 1pt solid" valign="bottom" colspan="10" align="center">
<b>Year Ended December 31, 2016</b></td>
<td valign="bottom"> </td>
</tr>
<tr style="FONT-SIZE: 8pt; FONT-FAMILY: "Times New Roman"; break-inside: avoid">
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td valign="bottom" colspan="10" align="center"><b>(in
thousands)</b></td>
<td valign="bottom"> </td>
</tr>
<tr style="FONT-SIZE: 8pt; FONT-FAMILY: "Times New Roman"; break-inside: avoid">
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td valign="bottom" colspan="2" align="center"><b>Cash</b></td>
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td valign="bottom" colspan="2" align="center"><b><font style="WHITE-SPACE: nowrap">Non-cash</font></b></td>
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td valign="bottom" colspan="2" align="center"><b>Total</b></td>
<td valign="bottom"> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; break-inside: avoid" bgcolor="#CCEEFF">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; MARGIN-LEFT: 1em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Research and development</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom">$</td>
<td valign="bottom" align="right">455</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom">$</td>
<td valign="bottom" align="right">7</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom">$</td>
<td valign="bottom" align="right">462</td>
<td valign="bottom" nowrap="nowrap"> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; break-inside: avoid">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; MARGIN-LEFT: 1em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
General and administrative</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">768</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">173</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">941</td>
<td valign="bottom" nowrap="nowrap"> </td>
</tr>
<tr style="FONT-SIZE: 1px">
<td valign="bottom"></td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; break-inside: avoid" bgcolor="#CCEEFF">
<td valign="top"></td>
<td valign="bottom">  </td>
<td valign="bottom">$</td>
<td valign="bottom" align="right">1,223</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom">$</td>
<td valign="bottom" align="right">180</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom">$</td>
<td valign="bottom" align="right">1,403</td>
<td valign="bottom" nowrap="nowrap"> </td>
</tr>
<tr style="FONT-SIZE: 1px">
<td valign="bottom"></td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
</tr>
</table>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; WHITE-SPACE: normal; WORD-SPACING: 0px; TEXT-TRANSFORM: none; FONT-WEIGHT: normal; COLOR: rgb(0,0,0); FONT-STYLE: normal; ORPHANS: 2; WIDOWS: 2; MARGIN-TOP: 12pt; LETTER-SPACING: normal; TEXT-INDENT: 4%; font-variant-ligatures: normal; font-variant-caps: normal; -webkit-text-stroke-width: 0px">
The following table summarizes the restructuring reserve for the
periods indicated:</p>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 12pt; FONT-FAMILY: "Times New Roman"; WHITE-SPACE: normal; WORD-SPACING: 0px; TEXT-TRANSFORM: none; FONT-WEIGHT: normal; COLOR: rgb(0,0,0); FONT-STYLE: normal; ORPHANS: 2; WIDOWS: 2; MARGIN-TOP: 0pt; LETTER-SPACING: normal; TEXT-INDENT: 0px; font-variant-ligatures: normal; font-variant-caps: normal; -webkit-text-stroke-width: 0px">
 </p>
<table style="FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; WORD-SPACING: 0px; BORDER-COLLAPSE: collapse; TEXT-TRANSFORM: none; ORPHANS: 2; WIDOWS: 2; LETTER-SPACING: normal; TEXT-INDENT: 0px; -webkit-text-stroke-width: 0px" cellspacing="0" cellpadding="0" width="68%" align="center" border="0">
<tr>
<td width="74%"></td>
<td valign="bottom" width="22%"></td>
<td></td>
<td></td>
<td></td>
</tr>
<tr style="FONT-SIZE: 8pt; FONT-FAMILY: "Times New Roman"; break-inside: avoid">
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td style="BORDER-BOTTOM: rgb(0,0,0) 1pt solid" valign="bottom" colspan="2" align="center"><b>Year Ended</b><br />
<b>December 31, 2016</b></td>
<td valign="bottom"> </td>
</tr>
<tr style="FONT-SIZE: 8pt; FONT-FAMILY: "Times New Roman"; break-inside: avoid">
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td valign="bottom" colspan="2" align="center"><b>(in
thousands)</b></td>
<td valign="bottom"> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; break-inside: avoid" bgcolor="#CCEEFF">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; MARGIN-LEFT: 1em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Restructuring reserve beginning balance</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom" nowrap="nowrap">$</td>
<td valign="bottom" nowrap="nowrap" align="right">
—  </td>
<td valign="bottom" nowrap="nowrap"> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; break-inside: avoid">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; MARGIN-LEFT: 3em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Restructuring expenses incurred during the period</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">1,223</td>
<td valign="bottom" nowrap="nowrap"> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; break-inside: avoid" bgcolor="#CCEEFF">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; MARGIN-LEFT: 3em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Amounts paid during the period</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">(847</td>
<td valign="bottom" nowrap="nowrap">) </td>
</tr>
<tr style="FONT-SIZE: 1px">
<td valign="bottom"></td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; break-inside: avoid">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; MARGIN-LEFT: 1em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Restructuring reserve ending balance</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom">$</td>
<td valign="bottom" align="right">376</td>
</tr>
</table>
</div>
<div>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-TOP: 12pt; TEXT-INDENT: 4%">
A reconciliation of the U.S. federal statutory income tax rate to
the Company’s effective income tax rate is as follows:</p>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 12pt; MARGIN-TOP: 0pt">
 </p>
<table style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; BORDER-COLLAPSE: collapse" cellspacing="0" cellpadding="0" width="84%" align="center" border="0">
<tr>
<td width="75%"></td>
<td valign="bottom" width="6%"></td>
<td></td>
<td></td>
<td></td>
<td valign="bottom" width="5%"></td>
<td></td>
<td></td>
<td></td>
<td valign="bottom" width="5%"></td>
<td></td>
<td></td>
<td></td>
</tr>
<tr style="FONT-SIZE: 8pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid">
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td style="BORDER-BOTTOM: #000000 1pt solid" valign="bottom" colspan="10" align="center"><b>Year Ended
December 31,</b></td>
<td valign="bottom"> </td>
</tr>
<tr style="FONT-SIZE: 8pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid">
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td style="BORDER-BOTTOM: #000000 1pt solid" valign="bottom" colspan="2" align="center"><b>2016</b></td>
<td valign="bottom"> </td>
<td valign="bottom"> </td>
<td style="BORDER-BOTTOM: #000000 1pt solid" valign="bottom" colspan="2" align="center"><b>2015</b></td>
<td valign="bottom"> </td>
<td valign="bottom"> </td>
<td style="BORDER-BOTTOM: #000000 1pt solid" valign="bottom" colspan="2" align="center"><b>2014</b></td>
<td valign="bottom"> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid" bgcolor="#CCEEFF">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-LEFT: 1em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Federal statutory income tax rate</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">(34.0</td>
<td valign="bottom" nowrap="nowrap">%) </td>
<td valign="bottom"> </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">(34.0</td>
<td valign="bottom" nowrap="nowrap">%) </td>
<td valign="bottom"> </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">(34.0</td>
<td valign="bottom" nowrap="nowrap">%) </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-LEFT: 3em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Federal and state research and development tax credit</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">(2.9</td>
<td valign="bottom" nowrap="nowrap">) </td>
<td valign="bottom"> </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">(3.9</td>
<td valign="bottom" nowrap="nowrap">) </td>
<td valign="bottom"> </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">(1.9</td>
<td valign="bottom" nowrap="nowrap">) </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid" bgcolor="#CCEEFF">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-LEFT: 3em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
State taxes, net of federal benefit</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">(3.9</td>
<td valign="bottom" nowrap="nowrap">) </td>
<td valign="bottom"> </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">(3.9</td>
<td valign="bottom" nowrap="nowrap">) </td>
<td valign="bottom"> </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">(4.0</td>
<td valign="bottom" nowrap="nowrap">) </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-LEFT: 3em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Orphan drug tax credit</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">(1.3</td>
<td valign="bottom" nowrap="nowrap">) </td>
<td valign="bottom"> </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">(3.5</td>
<td valign="bottom" nowrap="nowrap">) </td>
<td valign="bottom"> </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">(3.2</td>
<td valign="bottom" nowrap="nowrap">) </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid" bgcolor="#CCEEFF">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-LEFT: 3em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Stock compensation expense</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">0.7</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom"> </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">0.9</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom"> </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">0.6</td>
<td valign="bottom" nowrap="nowrap"> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-LEFT: 3em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Nondeductible Australia research and development expenses</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">0.0</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom"> </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">1.0</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom"> </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">0.6</td>
<td valign="bottom" nowrap="nowrap"> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid" bgcolor="#CCEEFF">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-LEFT: 3em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Other items</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">1.3</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom"> </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">0.1</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom"> </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">2.4</td>
<td valign="bottom" nowrap="nowrap"> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-LEFT: 3em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Change in deferred tax asset valuation allowance</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">40.1</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom"> </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">43.3</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom"> </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">39.5</td>
<td valign="bottom" nowrap="nowrap"> </td>
</tr>
<tr style="FONT-SIZE: 1px">
<td valign="bottom"></td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
<td valign="bottom"> </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
<td valign="bottom"> </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid" bgcolor="#CCEEFF">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-LEFT: 1em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Effective income tax rate</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">0.0</td>
<td valign="bottom" nowrap="nowrap">% </td>
<td valign="bottom"> </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">0.0</td>
<td valign="bottom" nowrap="nowrap">% </td>
<td valign="bottom"> </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">0.0</td>
<td valign="bottom" nowrap="nowrap">% </td>
</tr>
<tr style="FONT-SIZE: 1px">
<td valign="bottom"></td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
<td valign="bottom"> </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
<td valign="bottom"> </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
</tr>
</table>
</div>
<div>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; WHITE-SPACE: normal; WORD-SPACING: 0px; TEXT-TRANSFORM: none; FONT-WEIGHT: normal; COLOR: rgb(0,0,0); FONT-STYLE: normal; ORPHANS: 2; WIDOWS: 2; MARGIN-TOP: 12pt; LETTER-SPACING: normal; TEXT-INDENT: 4%; font-variant-ligatures: normal; font-variant-caps: normal; -webkit-text-stroke-width: 0px">
The following table summarizes the Company’s stock option
activity since December 31, 2015:</p>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 12pt; FONT-FAMILY: "Times New Roman"; WHITE-SPACE: normal; WORD-SPACING: 0px; TEXT-TRANSFORM: none; FONT-WEIGHT: normal; COLOR: rgb(0,0,0); FONT-STYLE: normal; ORPHANS: 2; WIDOWS: 2; MARGIN-TOP: 0pt; LETTER-SPACING: normal; TEXT-INDENT: 0px; font-variant-ligatures: normal; font-variant-caps: normal; -webkit-text-stroke-width: 0px">
 </p>
<table style="FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; WORD-SPACING: 0px; BORDER-COLLAPSE: collapse; TEXT-TRANSFORM: none; ORPHANS: 2; WIDOWS: 2; LETTER-SPACING: normal; TEXT-INDENT: 0px; -webkit-text-stroke-width: 0px" cellspacing="0" cellpadding="0" width="100%" align="center" border="0">
<tr>
<td width="57%"></td>
<td valign="bottom" width="6%"></td>
<td></td>
<td></td>
<td></td>
<td valign="bottom" width="6%"></td>
<td></td>
<td></td>
<td></td>
<td valign="bottom" width="6%"></td>
<td></td>
<td></td>
<td></td>
<td valign="bottom" width="6%"></td>
<td></td>
<td></td>
<td></td>
</tr>
<tr style="FONT-SIZE: 8pt; FONT-FAMILY: "Times New Roman"; break-inside: avoid">
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td style="BORDER-BOTTOM: rgb(0,0,0) 1pt solid" valign="bottom" colspan="2" align="center"><b>Shares Issuable<br />
Under Options</b></td>
<td valign="bottom"> </td>
<td valign="bottom"> </td>
<td style="BORDER-BOTTOM: rgb(0,0,0) 1pt solid" valign="bottom" colspan="2" align="center"><b>Weighted<br />
Average<br />
Exercise<br />
Price</b></td>
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td style="BORDER-BOTTOM: rgb(0,0,0) 1pt solid" valign="bottom" colspan="2" align="center"><b>Average<br />
Remaining<br />
Contractual<br />
Term</b></td>
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td style="BORDER-BOTTOM: rgb(0,0,0) 1pt solid" valign="bottom" colspan="2" align="center"><b>Aggregate<br />
Intrinsic<br />
Value</b></td>
<td valign="bottom"> </td>
</tr>
<tr style="FONT-SIZE: 8pt; FONT-FAMILY: "Times New Roman"; break-inside: avoid">
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td valign="bottom" colspan="2"> </td>
<td valign="bottom"> </td>
<td valign="bottom"> </td>
<td valign="bottom" colspan="2"> </td>
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td valign="bottom" colspan="2" align="center"><b>(in
years)</b></td>
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td valign="bottom" colspan="2" align="center">
<b>(in thousands)</b></td>
<td valign="bottom"> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; break-inside: avoid" bgcolor="#CCEEFF">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; MARGIN-LEFT: 1em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
<b>Outstanding as of December 31, 2015</b></p>
</td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">2,555,110</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom"> </td>
<td valign="bottom">$</td>
<td valign="bottom" align="right">19.76</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom">  </td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom"></td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; break-inside: avoid">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; MARGIN-LEFT: 3em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Granted</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">1,527,559</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom"> </td>
<td valign="bottom">$</td>
<td valign="bottom" align="right">6.65</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom">  </td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom"></td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; break-inside: avoid" bgcolor="#CCEEFF">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; MARGIN-LEFT: 3em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Exercised</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">(35,000</td>
<td valign="bottom" nowrap="nowrap">) </td>
<td valign="bottom"> </td>
<td valign="bottom">$</td>
<td valign="bottom" align="right">0.75</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom">  </td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom"></td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; break-inside: avoid">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; MARGIN-LEFT: 3em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Forfeited</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">(932,666</td>
<td valign="bottom" nowrap="nowrap">) </td>
<td valign="bottom"> </td>
<td valign="bottom">$</td>
<td valign="bottom" align="right">16.90</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom">  </td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom"></td>
</tr>
<tr style="FONT-SIZE: 1px">
<td valign="bottom"></td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
<td valign="bottom"> </td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom">  </td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom">  </td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom"></td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; break-inside: avoid" bgcolor="#CCEEFF">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; MARGIN-LEFT: 1em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
<b>Outstanding as of December 31, 2016</b></p>
</td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">3,115,003</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom"> </td>
<td valign="bottom">$</td>
<td valign="bottom" align="right">14.40</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">7.2</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom">$</td>
<td valign="bottom" align="right">1,038</td>
<td valign="bottom" nowrap="nowrap"> </td>
</tr>
<tr style="FONT-SIZE: 1px">
<td valign="bottom"></td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
<td valign="bottom"> </td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom">  </td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom">  </td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom"></td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; break-inside: avoid">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; MARGIN-LEFT: 1em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
<b>Options vested and expected to vest as of December 31,
2016</b></p>
</td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">3,080,777</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom"> </td>
<td valign="bottom">$</td>
<td valign="bottom" align="right">14.40</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">7.2</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom">$</td>
<td valign="bottom" align="right">1,038</td>
<td valign="bottom" nowrap="nowrap"> </td>
</tr>
<tr style="FONT-SIZE: 1px">
<td valign="bottom"></td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
<td valign="bottom"> </td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom">  </td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom">  </td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom"></td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; break-inside: avoid" bgcolor="#CCEEFF">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: "Times New Roman"; MARGIN-LEFT: 1em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
<b>Options exercisable as of December 31, 2016</b></p>
</td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">1,605,537</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom"> </td>
<td valign="bottom">$</td>
<td valign="bottom" align="right">14.18</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">5.5</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom">$</td>
<td valign="bottom" align="right">1,036</td>
<td valign="bottom" nowrap="nowrap"> </td>
</tr>
<tr style="FONT-SIZE: 1px">
<td valign="bottom"></td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: rgb(0,0,0) 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
<td valign="bottom"> </td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom">  </td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom">  </td>
<td valign="bottom"></td>
<td valign="bottom"></td>
<td valign="bottom"></td>
</tr>
</table>
<p style="MARGIN-BOTTOM: 0px; FONT-SIZE: 1px; FONT-FAMILY: "Times New Roman"; WHITE-SPACE: normal; WORD-SPACING: 0px; TEXT-TRANSFORM: none; FONT-WEIGHT: normal; COLOR: rgb(0,0,0); FONT-STYLE: normal; ORPHANS: 2; WIDOWS: 2; MARGIN-TOP: 12px; LETTER-SPACING: normal; TEXT-INDENT: 0px; font-variant-ligatures: normal; font-variant-caps: normal; -webkit-text-stroke-width: 0px">
 </p>
</div>
100000
1527559
4.86
<div>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-TOP: 18pt">
<b>Accounting for Stock-Based Compensation</b></p>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-TOP: 6pt; TEXT-INDENT: 4%">
The Company measures all stock options and other stock-based awards
granted to employees and directors at the fair value on the date of
the grant using the Black-Scholes option-pricing model. The fair
value of the awards is recognized as expense, net of estimated
forfeitures, over the requisite service period, which is generally
the vesting period of the respective award. The straight-line
method of expense recognition is applied to all awards with
service-only conditions.</p>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-TOP: 12pt; TEXT-INDENT: 4%">
For stock-based awards granted to consultants and nonemployees,
compensation expense is recognized over the period during which
services are rendered by such consultants and nonemployees until
completed. At the end of each financial reporting period prior to
completion of the service, the fair value of these awards is
<font style="WHITE-SPACE: nowrap">re-measured</font> using the
then-current fair value of the Company’s common stock and
updated assumption inputs in the Black-Scholes option-pricing
model.</p>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-TOP: 12pt; TEXT-INDENT: 4%">
The Company classifies stock-based compensation expense in its
consolidated statement of operations and comprehensive loss in the
same manner in which the award recipient’s payroll costs are
classified or in which the award recipients’ service payments
are classified.</p>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-TOP: 12pt; TEXT-INDENT: 4%">
The Company recognizes compensation expense for only the portion of
awards that are expected to vest. In developing a forfeiture rate
estimate, the Company has considered its historical experience to
estimate <font style="WHITE-SPACE: nowrap">pre-vesting</font>
forfeitures for service-based awards.</p>
</div>
<div>
<p style="margin-top:18pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">
<b>13. Australia Research and Development Tax Incentive</b></p>
<p style="margin-top:6pt; margin-bottom:0pt; text-indent:4%; font-size:10pt; font-family:Times New Roman">
The Company’s wholly owned subsidiary, Zafgen Australia Pty
Limited, which conducts core research and development activities on
behalf of the Company, is eligible to receive a 45% refundable tax
incentive for qualified research and development activities. For
the years ended December 31, 2016, 2015 and 2014,
$0.3 million, $1.4 million and $0.4 million,
respectively, were recorded as a reduction to research and
development expenses in the consolidated statements of operations.
These amounts represented 45% of the Company’s qualified
research and development spending in Australia. The refund is
denominated in Australian dollars and, therefore, the related
receivable is <font style="white-space:nowrap">re-measured</font>
into U.S. dollars as of each reporting date. For the years ended
December 31, 2016, 2015 and 2014, the Company recorded in its
consolidated statements of operations unrealized foreign currency
exchange gains (losses) of less than $(0.1) million, $(0.1) million
and $(0.1) million, respectively, related to this tax incentive
receivable. As of December 31, 2016 and 2015, the
Company’s tax incentive receivable from the Australian
government was $0.3 million and $1.3 million,
respectively.</p>
</div>
0.0140
932666
10113000
P6Y2M5D
27297934
<div>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-TOP: 12pt; TEXT-INDENT: 4%">
The following table summarizes the restructuring costs by category
for the periods indicated:</p>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 12pt; MARGIN-TOP: 0pt">
 </p>
<table style="FONT-SIZE: 8pt; FONT-FAMILY: Times New Roman; BORDER-COLLAPSE: collapse" cellspacing="0" cellpadding="0" width="84%" align="center" border="0">
<tr>
<td width="69%"></td>
<td valign="bottom" width="6%"></td>
<td></td>
<td></td>
<td></td>
<td valign="bottom" width="6%"></td>
<td></td>
<td></td>
<td></td>
<td valign="bottom" width="6%"></td>
<td></td>
<td></td>
<td></td>
</tr>
<tr style="FONT-SIZE: 8pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid">
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td style="BORDER-BOTTOM: #000000 1pt solid" valign="bottom" colspan="10" align="center">
<b>Year Ended December 31, 2016</b></td>
<td valign="bottom"> </td>
</tr>
<tr style="FONT-SIZE: 8pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid">
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td valign="bottom" colspan="10" align="center"><b>(in
thousands)</b></td>
<td valign="bottom"> </td>
</tr>
<tr style="FONT-SIZE: 8pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid">
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td valign="bottom" colspan="2" align="center"><b>Cash</b></td>
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td valign="bottom" colspan="2" align="center"><b><font style="WHITE-SPACE: nowrap">Non-cash</font></b></td>
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td valign="bottom" colspan="2" align="center"><b>Total</b></td>
<td valign="bottom"> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid" bgcolor="#CCEEFF">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-LEFT: 1em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Research and development</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom">$</td>
<td valign="bottom" align="right">455</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom">$</td>
<td valign="bottom" align="right">7</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom">$</td>
<td valign="bottom" align="right">462</td>
<td valign="bottom" nowrap="nowrap"> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-LEFT: 1em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
General and administrative</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">768</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">173</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">941</td>
<td valign="bottom" nowrap="nowrap"> </td>
</tr>
<tr style="FONT-SIZE: 1px">
<td valign="bottom"></td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid" bgcolor="#CCEEFF">
<td valign="top"></td>
<td valign="bottom">  </td>
<td valign="bottom">$</td>
<td valign="bottom" align="right">1,223</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom">$</td>
<td valign="bottom" align="right">180</td>
<td valign="bottom" nowrap="nowrap"> </td>
<td valign="bottom">  </td>
<td valign="bottom">$</td>
<td valign="bottom" align="right">1,403</td>
<td valign="bottom" nowrap="nowrap"> </td>
</tr>
<tr style="FONT-SIZE: 1px">
<td valign="bottom"></td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
</tr>
</table>
</div>
2935000
P7Y2M12D
<div>
<p style="margin-top:18pt; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman">
<b>12. Retirement Plan</b></p>
<p style="margin-top:6pt; margin-bottom:0pt; text-indent:4%; font-size:10pt; font-family:Times New Roman">
The Company has a Savings Incentive Match Plan, or SIMPLE IRA, for
employees. Under the terms of the plan, the Company contributes 2%
of an employee’s annual base salary, up to a maximum of the
annual Internal Revenue Service compensation limits, for all
full-time employees.</p>
<p style="margin-top:12pt; margin-bottom:0pt; text-indent:4%; font-size:10pt; font-family:Times New Roman">
During the years ended December 31, 2016, 2015 and 2014, the
Company recognized $0.2 million, $0.1 million and less
than $0.1 million, respectively, of expense related to its
contributions to the plan.</p>
</div>
<div>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-TOP: 12pt; TEXT-INDENT: 4%">
As of December 31, 2016 and 2015, notes payable consist of the
following:</p>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 12pt; MARGIN-TOP: 0pt">
 </p>
<table style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; BORDER-COLLAPSE: collapse" cellspacing="0" cellpadding="0" width="68%" align="center" border="0">
<tr>
<td width="79%"></td>
<td valign="bottom" width="15%"></td>
<td></td>
<td></td>
<td></td>
</tr>
<tr style="FONT-SIZE: 8pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid">
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td valign="bottom" colspan="2" align="center">
<b>December 31,</b></td>
<td valign="bottom"> </td>
</tr>
<tr style="FONT-SIZE: 8pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid">
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td style="BORDER-BOTTOM: #000000 1pt solid" valign="bottom" colspan="2" align="center"><b>2016</b></td>
<td valign="bottom"> </td>
</tr>
<tr style="FONT-SIZE: 8pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid">
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td valign="bottom" colspan="2" align="center">
<b>(in thousands)</b></td>
<td valign="bottom"> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid" bgcolor="#CCEEFF">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-LEFT: 1em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Notes payable</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">3,183</td>
<td valign="bottom" nowrap="nowrap"> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-LEFT: 1em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Debt discount, net of accretion</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">(9</td>
<td valign="bottom" nowrap="nowrap">) </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid" bgcolor="#CCEEFF">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-LEFT: 1em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Accretion related to final payment</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">415</td>
<td valign="bottom" nowrap="nowrap"> </td>
</tr>
<tr style="FONT-SIZE: 1px">
<td valign="bottom"></td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-LEFT: 1em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Notes payable, net of discount, short term</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom">$</td>
<td valign="bottom" align="right">3,589</td>
<td valign="bottom" nowrap="nowrap"> </td>
</tr>
<tr style="FONT-SIZE: 1px">
<td valign="bottom"></td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
</tr>
</table>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 12pt; MARGIN-TOP: 0pt">
 </p>
<table style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; BORDER-COLLAPSE: collapse" cellspacing="0" cellpadding="0" width="68%" align="center" border="0">
<tr>
<td width="79%"></td>
<td valign="bottom" width="15%"></td>
<td></td>
<td></td>
<td></td>
</tr>
<tr style="FONT-SIZE: 8pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid">
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td valign="bottom" colspan="2" align="center">
<b>December 31,</b></td>
<td valign="bottom"> </td>
</tr>
<tr style="FONT-SIZE: 8pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid">
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td style="BORDER-BOTTOM: #000000 1pt solid" valign="bottom" colspan="2" align="center"><b>2015</b></td>
<td valign="bottom"> </td>
</tr>
<tr style="FONT-SIZE: 8pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid">
<td valign="bottom"> </td>
<td valign="bottom">  </td>
<td valign="bottom" colspan="2" align="center">
<b>(in thousands)</b></td>
<td valign="bottom"> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid" bgcolor="#CCEEFF">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-LEFT: 1em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Notes payable</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom">$</td>
<td valign="bottom" align="right">6,119</td>
<td valign="bottom" nowrap="nowrap"> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-LEFT: 1em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Less: current portion</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">(2,936</td>
<td valign="bottom" nowrap="nowrap">) </td>
</tr>
<tr style="FONT-SIZE: 1px">
<td valign="bottom"></td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid" bgcolor="#CCEEFF">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-LEFT: 1em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Notes payable, net of current portion</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">3,183</td>
<td valign="bottom" nowrap="nowrap"> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-LEFT: 1em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Debt discount, net of accretion</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">(36</td>
<td valign="bottom" nowrap="nowrap">) </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid" bgcolor="#CCEEFF">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-LEFT: 1em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Accretion related to final payment</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom"> </td>
<td valign="bottom" align="right">306</td>
<td valign="bottom" nowrap="nowrap"> </td>
</tr>
<tr style="FONT-SIZE: 1px">
<td valign="bottom"></td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 1px solid; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
</tr>
<tr style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; PAGE-BREAK-INSIDE: avoid">
<td valign="top">
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-LEFT: 1em; MARGIN-TOP: 0pt; TEXT-INDENT: -1em">
Notes payable, net of discount, long term</p>
</td>
<td valign="bottom">  </td>
<td valign="bottom">$</td>
<td valign="bottom" align="right">3,453</td>
<td valign="bottom" nowrap="nowrap"> </td>
</tr>
<tr style="FONT-SIZE: 1px">
<td valign="bottom"></td>
<td valign="bottom">  </td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td valign="bottom">
<p style="MARGIN-BOTTOM: 0pt; BORDER-TOP: #000000 3px double; MARGIN-TOP: 0pt">
 </p>
</td>
<td> </td>
</tr>
</table>
</div>
0.060
23179000
340000
<div>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-TOP: 18pt">
<b>Research Contract Costs and Accruals</b></p>
<p style="MARGIN-BOTTOM: 0pt; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman; MARGIN-TOP: 6pt; TEXT-INDENT: 4%">
The Company has entered into various research and development
contracts with research institutions and other companies both
inside and outside of the United States. These agreements are
generally cancelable, and related payments are recorded as research
and development expenses as incurred. The Company records accruals
for estimated ongoing research costs. When evaluating the adequacy
of the accrued liabilities, the Company analyzes progress of the
studies, including the phase or completion of events, invoices
received and contracted costs. Significant judgments and estimates
are made in determining the accrued balances at the end of any
reporting period. Actual results could differ from the
Company’s estimates. The Company’s historical accrual
estimates have not been materially different from the actual
costs.</p>
</div>
0
-35000
220000
-970000
0.013
0.50
3115003
1519559
8000
0
500000
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