Income Taxes (Details) - USD ($)
$ in Thousands |
12 Months Ended |
Dec. 31, 2015 |
Dec. 31, 2014 |
Dec. 31, 2013 |
| Income (loss) before income taxes: |
|
|
|
| Domestic |
$ (933)
|
$ 7,464
|
$ 3,633
|
| Foreign |
(451)
|
1,103
|
118
|
| Income (loss) before income taxes |
(1,384)
|
8,567
|
3,751
|
| Domestic |
|
|
|
| Federal |
154
|
76
|
64
|
| State |
45
|
52
|
53
|
| Foreign |
366
|
288
|
147
|
| Total current tax expense |
565
|
416
|
264
|
| Domestic |
|
|
|
| Federal |
822
|
1,761
|
1,572
|
| State |
5
|
30
|
44
|
| Foreign |
(296)
|
(5)
|
(16)
|
| Valuation allowance |
(828)
|
(1,791)
|
(1,616)
|
| Total deferred tax benefit |
(297)
|
(5)
|
(16)
|
| Total income tax expense |
$ 268
|
$ 411
|
$ 248
|
| Reconciliation from the U.S. statutory federal income tax rate to the effective income tax rate |
|
|
|
| U.S. federal statutory rate (as a percent) |
34.00%
|
34.00%
|
34.00%
|
| State taxes, net of federal benefit (as a percent) |
(2.10%)
|
0.40%
|
1.10%
|
| Stock-based compensation (as a percent) |
(80.00%)
|
(2.10%)
|
22.70%
|
| Stock warrant (as a percent) |
|
|
6.40%
|
| Research and development credits (as a percent) |
|
(8.10%)
|
(18.30%)
|
| Change in valuation allowance (as a percent) |
59.50%
|
(20.60%)
|
(42.00%)
|
| Non-deductible acquisition costs (as percent) |
(21.20%)
|
|
|
| Return to provision adjustments (as a percent) |
10.60%
|
(0.80%)
|
(1.60%)
|
| Permanent items (as a percent) |
(9.50%)
|
2.90%
|
4.00%
|
| Differences in foreign tax rates (as a percent) |
(11.90%)
|
(0.90%)
|
2.20%
|
| Other, net (as a percent) |
1.20%
|
|
(1.90%)
|
| Effective income tax rate (as a percent) |
(19.40%)
|
4.80%
|
6.60%
|
| Deferred Tax Assets: |
|
|
|
| Reserves and accruals |
$ 1,968
|
$ 1,449
|
|
| Inventories |
1,469
|
1,063
|
|
| Net operating loss carryforwards |
22,076
|
25,007
|
|
| Property, plant and equipment |
1,609
|
1,831
|
|
| Intangible assets |
428
|
|
|
| Stock-based compensation |
2,727
|
1,540
|
|
| Research and development credit carryforwards |
5,366
|
5,243
|
|
| Other |
73
|
|
|
| Total deferred tax assets |
35,716
|
36,133
|
|
| Valuation allowance |
(35,222)
|
(36,050)
|
|
| Total deferred tax assets, net |
494
|
83
|
|
| Deferred Tax Liabilities: |
|
|
|
| Undistributed earnings of foreign subsidiaries |
(109)
|
(56)
|
|
| Intangible Assets |
|
(116)
|
|
| Property and equipment |
|
(16)
|
|
| Total deferred tax liabilities |
(109)
|
(188)
|
|
| Net deferred tax asset |
385
|
|
|
| Net deferred tax liability |
|
(105)
|
|
| Increase (decrease) in net valuation allowance |
$ (800)
|
$ (1,800)
|
|