|
Income Taxes Income Taxes (Tables)
|
12 Months Ended |
|
Dec. 31, 2013
|
| Income Tax Disclosure [Abstract] |
|
| Components of Income (Loss) before Provision (Benefit) for Income Tax, Domestic and Foreign |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Years Ended December 31, |
|
2013 |
|
2012 |
|
2011 |
Domestic |
$ |
(12,770 |
) |
|
$ |
(11,918 |
) |
|
$ |
(13,775 |
) |
Foreign |
439 |
|
|
(993 |
) |
|
(1,256 |
) |
Loss before income taxes |
$ |
(12,331 |
) |
|
$ |
(12,911 |
) |
|
$ |
(15,031 |
) |
|
| Components of Income Tax Expense (Benefit) |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Years Ended December 31, |
|
2013 |
|
2012 |
|
2011 |
Current: |
|
|
|
|
|
Federal |
$ |
— |
|
|
$ |
— |
|
|
$ |
236 |
|
State |
— |
|
|
— |
|
|
20 |
|
Foreign |
574 |
|
|
351 |
|
|
69 |
|
Total current |
574 |
|
|
351 |
|
|
325 |
|
Deferred: |
|
|
|
|
|
Federal |
(5,217 |
) |
|
(4,162 |
) |
|
(5,183 |
) |
State |
(1,174 |
) |
|
(2,062 |
) |
|
(1,731 |
) |
Foreign |
(166 |
) |
|
— |
|
|
685 |
|
Change in valuation allowance |
6,385 |
|
|
6,214 |
|
|
12,897 |
|
Total deferred |
(172 |
) |
|
(10 |
) |
|
6,668 |
|
Total income tax provision |
$ |
402 |
|
|
$ |
341 |
|
|
$ |
6,993 |
|
|
| Effective Income Tax Rate Reconciliation |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Years Ended December 31, |
|
2013 |
|
2012 |
|
2011 |
Benefit at statutory rate |
$ |
(4,191 |
) |
|
$ |
(4,390 |
) |
|
$ |
(5,111 |
) |
State income taxes (net of federal benefit) |
1 |
|
|
(1,247 |
) |
|
24 |
|
Research and development credits |
(3,630 |
) |
|
(858 |
) |
|
(3,320 |
) |
Foreign rate differential |
(80 |
) |
|
445 |
|
|
1,182 |
|
Stock compensation |
460 |
|
|
278 |
|
|
974 |
|
Foreign deemed dividend |
835 |
|
|
— |
|
|
94 |
|
Estimated export compliance fines and penalties |
— |
|
|
(255 |
) |
|
255 |
|
Foreign tax credit |
— |
|
|
— |
|
|
(236 |
) |
Uncertain tax positions |
266 |
|
|
199 |
|
|
236 |
|
Permanent and other |
356 |
|
|
(45 |
) |
|
24 |
|
Valuation allowance |
6,385 |
|
|
6,214 |
|
|
12,871 |
|
Total provision for income taxes |
$ |
402 |
|
|
$ |
341 |
|
|
$ |
6,993 |
|
|
| Components of Deferred Tax Assets |
|
|
|
|
|
|
|
|
|
|
December 31, |
|
2013 |
|
2012 |
Deferred tax assets: |
|
|
|
Net operating loss carryforwards |
$ |
8,545 |
|
|
$ |
8,216 |
|
Research and development credits |
12,718 |
|
|
9,088 |
|
Accrued expenses and other |
476 |
|
|
403 |
|
Accrued compensation |
1,686 |
|
|
1,567 |
|
Stock-based compensation |
2,732 |
|
|
3,184 |
|
Depreciation and amortization |
2,637 |
|
|
— |
|
|
28,794 |
|
|
22,458 |
|
Less valuation allowance |
(28,628 |
) |
|
(22,243 |
) |
|
166 |
|
|
215 |
|
Deferred tax liability: |
|
|
|
Depreciation and amortization |
— |
|
|
(215 |
) |
Net deferred tax assets |
$ |
166 |
|
|
$ |
— |
|
|
| Summary of Changes to Unrecognized Tax Benefits |
|
|
|
|
|
Balance as of December 31, 2010 |
$ |
1,184 |
|
Additions based on tax positions related to the current year |
1,018 |
|
Additions based on tax positions of prior year |
818 |
|
Balance as of December 31, 2011 |
3,020 |
|
Additions based on tax positions related to the current year |
725 |
|
Additions based on tax positions of prior years |
132 |
|
Decreases based on tax positions of prior year |
(127 |
) |
Balance as of December 31, 2012 |
3,750 |
|
Additions based on tax positions related to the current year |
1,689 |
|
Additions based on tax positions of prior years |
23 |
|
Balance as of December 31, 2013 |
$ |
5,462 |
|
|