Net Income (Loss) Per Common Share - Schedule of Anti-Dilutive Shares Excluded from Computation of Diluted Net Loss Per Share (Detail) - shares |
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
Sep. 30, 2016 |
Sep. 30, 2015 |
Sep. 30, 2016 |
Sep. 30, 2015 |
|
| Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] | ||||
| Total | 4,955,422 | 8,435,765 | 6,713,810 | 7,405,976 |
| Options to Purchase Common Stock | ||||
| Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] | ||||
| Total | 4,736,258 | 6,778,265 | 6,447,978 | 5,498,476 |
| Restricted Stock Awards, Including Participating Securities | ||||
| Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] | ||||
| Total | 219,164 | 1,657,500 | 265,832 | 1,907,500 |