| Income Tax Disclosure [Abstract] | Period [Axis] |
|---|
2016-01-01 - 2016-12-31 |
|---|
Income Tax Disclosure [Abstract] | |
Schedule of Components of Loss Before Provision for Income Taxes |
The components of loss before provision for income taxes were as follows (in thousands):
|
|
|
Years Ended December 31, |
|
|
|
|
|
2016 |
|
|
|
2015 |
|
|
|
2014 |
|
|
United States |
|
$ |
(26,161 |
) |
|
$ |
(40,805 |
) |
|
$ |
(33,155 |
) |
|
Foreign |
|
|
(4,940 |
) |
|
|
(93 |
) |
|
|
539 |
|
|
Total |
|
$ |
(31,101 |
) |
|
$ |
(40,898 |
) |
|
$ |
(32,616 |
) |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Schedule of Components of Provision for Income Taxes |
The components of the provision for income taxes were as follows (in thousands):
|
|
|
Years Ended December 31, |
|
|
|
|
|
2016 |
|
|
|
2015 |
|
|
|
2014 |
|
|
Current: |
|
|
|
|
|
|
|
|
|
|
|
|
|
Federal |
|
$ |
— |
|
|
$ |
— |
|
|
$ |
— |
|
|
State |
|
|
7 |
|
|
|
21 |
|
|
|
— |
|
|
Foreign |
|
|
445 |
|
|
|
88 |
|
|
|
256 |
|
|
Total |
|
|
452 |
|
|
|
109 |
|
|
|
256 |
|
|
Deferred: |
|
|
|
|
|
|
|
|
|
|
|
|
|
Federal |
|
|
— |
|
|
|
— |
|
|
|
— |
|
|
State |
|
|
— |
|
|
|
— |
|
|
|
— |
|
|
Foreign |
|
|
— |
|
|
|
— |
|
|
|
— |
|
|
Total |
|
|
— |
|
|
|
— |
|
|
|
— |
|
|
Provision for income taxes |
|
$ |
452 |
|
|
$ |
109 |
|
|
$ |
256 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Schedule of Income Taxes Computed at Federal Statutory and Provision Income Taxes |
The items accounting for the difference between income taxes computed at the federal statutory income tax rate of 34% and the provision for income taxes consisted of the following (in thousands):
|
|
|
Years Ended December 31, |
|
|
|
|
|
2016 |
|
|
|
2015 |
|
|
|
2014 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Income tax benefit at statutory rate |
|
$ |
(10,574 |
) |
|
$ |
(13,832 |
) |
|
$ |
(11,089 |
) |
|
State taxes, net of federal benefit |
|
|
(213 |
) |
|
|
14 |
|
|
|
10 |
|
|
Impact of foreign income taxes |
|
|
2,124 |
|
|
|
119 |
|
|
|
73 |
|
|
Stock-based compensation |
|
|
2,340 |
|
|
|
1,629 |
|
|
|
1,043 |
|
|
Foreign exchange gain |
|
|
(1,920 |
) |
|
|
— |
|
|
|
— |
|
|
Change in valuation allowance |
|
|
9,510 |
|
|
|
12,673 |
|
|
|
10,434 |
|
|
Research and development credits |
|
|
(764 |
) |
|
|
(674 |
) |
|
|
(408 |
) |
|
Other |
|
|
(51 |
) |
|
|
180 |
|
|
|
193 |
|
|
|
|
$ |
452 |
|
|
$ |
109 |
|
|
$ |
256 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Schedule of Components of Net Deferred Tax Assets |
The Company’s net deferred tax assets consisted of the following at December 31, 2016 and 2015 (in thousands):
|
|
|
December 31, |
|
|
Deferred tax assets (liabilities) |
|
|
2016 |
|
|
|
2015 |
|
|
|
|
|
|
|
|
|
|
|
|
Deferred tax assets: |
|
|
|
|
|
|
|
|
|
Net operating loss carryforwards |
|
$ |
58,457 |
|
|
$ |
52,145 |
|
|
Deferred revenue |
|
|
372 |
|
|
|
80 |
|
|
Tax credits |
|
|
2,829 |
|
|
|
2,065 |
|
|
Accrued payroll |
|
|
935 |
|
|
|
1,071 |
|
|
Accrued expenses not currently deductible |
|
|
2,121 |
|
|
|
2,171 |
|
|
Non-qualified stock options |
|
|
3,164 |
|
|
|
1,716 |
|
|
Depreciation and amortization |
|
|
128 |
|
|
|
— |
|
|
Other |
|
|
46 |
|
|
|
128 |
|
|
Gross deferred assets |
|
|
68,052 |
|
|
|
59,376 |
|
|
Valuation allowance |
|
|
(68,052 |
) |
|
|
(58,542 |
) |
|
Total deferred tax assets, net of valuation allowance |
|
|
— |
|
|
|
834 |
|
|
Deferred tax liabilities: |
|
|
|
|
|
|
|
|
|
Depreciation and amortization |
|
|
— |
|
|
|
(399 |
) |
|
Unrealized foreign currency gain/loss |
|
|
— |
|
|
|
(435 |
) |
|
Total deferred tax liabilities |
|
|
— |
|
|
|
(834 |
) |
|
Net deferred assets |
|
$ |
— |
|
|
$ |
— |
|
|
|
|
|
|
|
|
|
|
|
|
Net Change in Total Valuation Allowance |
The net change in the total valuation allowance was as follows (in thousands):
|
|
|
December 31, |
|
|
|
|
2016 |
|
|
2015 |
|
|
2014 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Balance at beginning of period |
|
$ |
(58,542 |
) |
|
$ |
(45,011 |
) |
|
$ |
(34,357 |
) |
|
Tax valuation increase |
|
|
(9,779 |
) |
|
|
(14,375 |
) |
|
|
(10,975 |
) |
|
Tax valuation decrease |
|
|
269 |
|
|
|
844 |
|
|
|
321 |
|
|
Balance at end of period |
|
$ |
(68,052 |
) |
|
$ |
(58,542 |
) |
|
$ |
(45,011 |
) |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Summary of Unrecognized Gross Tax Benefits |
The total balance of unrecognized gross tax benefits was as follows (in thousands):
|
|
|
Years Ended December 31, |
|
|
|
|
|
2016 |
|
|
|
2015 |
|
|
|
2014 |
|
|
Unrecognized tax benefits at beginning of year |
|
$ |
2,065 |
|
|
$ |
1,391 |
|
|
$ |
255 |
|
|
Additions for tax positions in prior years |
|
|
— |
|
|
|
— |
|
|
|
408 |
|
|
Additions for tax positions in the current year |
|
|
764 |
|
|
|
674 |
|
|
|
728 |
|
|
Unrecognized tax benefits at end of year |
|
$ |
2,829 |
|
|
$ |
2,065 |
|
|
$ |
1,391 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|