Business Combination - Summary of Noncontrolling Interest (Detail) - USD ($) $ in Thousands |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2016 |
Dec. 31, 2015 |
Dec. 31, 2014 |
|
| Business Combinations [Abstract] | |||
| Noncontrolling interest at January 1, 2016 | $ 0 | ||
| Noncontrolling interest of acquired entity | 634 | ||
| Foreign currency effect | (68) | ||
| Loss attributable to noncontrolling interest | (287) | $ 0 | $ 0 |
| Noncontrolling interest at December 31, 2016 | $ 279 | $ 0 | |