Stockholders' Equity - Summary of RSU Activity (Detail) |
12 Months Ended |
|---|---|
|
Dec. 31, 2015
$ / shares
shares
| |
| Equity [Abstract] | |
| Balance outstanding at the beginning, Shares | shares | 220,298 |
| Shares Granted | shares | 62,942 |
| Shares Vested | shares | (61,362) |
| Shares Canceled | shares | (30,533) |
| Balance outstanding at the ending, shares | shares | 191,345 |
| Weighted Average Grant Date Fair Value, Beginning Balance | $ / shares | $ 7.04 |
| Weighted Average Grant Date Fair Value, Granted | $ / shares | 11.32 |
| Weighted Average Grant Date Fair Value, Vested | $ / shares | 6.84 |
| Weighted Average Grant Date Fair Value, Canceled | $ / shares | 7.47 |
| Weighted Average Grant Date Fair Value, Ending Balance | $ / shares | $ 8.45 |