Stockholders' Equity - Summary of Non-Vested Stock Options (Detail) $ / shares in Units, $ in Thousands |
12 Months Ended |
|---|---|
|
Dec. 31, 2015
USD ($)
$ / shares
shares
| |
| Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Number of Shares [Roll Forward] | |
| Nonvested at beginning of period | 655,547 |
| Nonvested, Shares, Granted | 684,629 |
| Nonvested, Shares, Vested | (207,797) |
| Nonvested, Shares, Forfeited | (238,034) |
| Nonvested at end of period | 894,345 |
| Weighted Average Grant Date Fair Value, Nonvested at December 31, 2015 | $ / shares | $ 9.12 |
| Nonvested at December 31, 2015, Aggregate Intrinsic Value | $ | $ 10 |