Commitments and Contingencies - Additional Information (Detail) - USD ($) $ in Thousands |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2015 |
Dec. 31, 2014 |
Dec. 31, 2013 |
|
| Other Commitments [Line Items] | |||
| Non-Cancelable operating lease expiration date | 2019 | ||
| Non-Cancelable lease agreement for office space, expiration date | Mar. 31, 2020 | ||
| Rent expense under lease arrangements | $ 1,002 | $ 717 | $ 734 |
| Employment Agreements [Member] | |||
| Other Commitments [Line Items] | |||
| Commitment under contracts | $ 6,300 | ||