Income Taxes - Reconciliation of Income Taxes (Detail) - USD ($) $ in Thousands |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2016 |
Dec. 31, 2015 |
Dec. 31, 2014 |
|
| Income Tax Disclosure [Abstract] | |||
| U.S. federal income tax at statutory rate | $ 996 | $ 422 | $ (94) |
| State taxes, net of federal benefit | 32 | 6 | (5) |
| Non-deductible expenses | (8) | (10) | (9) |
| Foreign income tax rate differential | (9) | (443) | (265) |
| Valuation allowance | (890) | 19 | 439 |
| Other | (28) | 3 | (80) |
| Total benefit (provision) for income taxes | $ 93 | $ (3) | $ (14) |