Income Taxes - Summary of Changes in Deferred Tax Valuation Allowance (Detail) - USD ($) $ in Thousands |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2016 |
Dec. 31, 2015 |
Dec. 31, 2014 |
|
| Income Tax Disclosure [Abstract] | |||
| Deferred tax valuation allowance, Beginning Balance | $ 1,534 | $ 1,565 | $ 2,200 |
| Additions | 1,256 | 150 | 17 |
| Deductions | (455) | (134) | (574) |
| Translation adjustments | (142) | (47) | (78) |
| Deferred tax valuation allowance, Ending Balance | $ 2,193 | $ 1,534 | $ 1,565 |