Accounts Receivable, Net - Schedule of Allowance for Doubtful Accounts (Detail) - USD ($) $ in Thousands |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2015 |
Dec. 31, 2014 |
Dec. 31, 2013 |
|
| Accounts receivable, net [Abstract] | |||
| Balance at beginning of the year | $ 131 | ||
| Additions | $ 4 | $ 523 | |
| Reversals | |||
| Write-off | (393) | ||
| Exchange difference | $ (9) | 1 | |
| Balance at end of the year | $ 126 | $ 131 | |