Accrued Liabilities - Summary of Accrued Warranty Obligations (Detail) - USD ($) $ in Thousands |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2015 |
Dec. 31, 2014 |
Dec. 31, 2013 |
|
| Payables And Accruals [Abstract] | |||
| Balance at January 1, | $ 1,470 | $ 2,199 | |
| Warranty liabilities assumed from acquisitions | 450 | 96 | |
| Amortization of fair value adjustment of warranty liabilities acquired through acquisitions | (12) | (164) | $ (47) |
| Reduction of warranty liabilities assumed in connection with acquisitions | (174) | (720) | |
| Warranty expense | 827 | 692 | |
| Warranty charges | (240) | (633) | |
| Balance at December 31, | $ 2,321 | $ 1,470 | $ 2,199 |