Net Income (Loss) per Common Share - Additional Information (Detail) - USD ($) $ in Millions |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Jun. 30, 2015 |
Jun. 30, 2014 |
Jun. 30, 2015 |
Jun. 30, 2014 |
|
| Warrant | ||||
| Earnings Per Share [Line Items] | ||||
| Securities included in the computation of diluted EPS | 700,000 | 700,000 | ||
| Income expense due to fair value adjustments related to warrants excluded from the computations of EPS | $ 1.2 | $ 0.0 | ||
| Restricted Stock | ||||
| Earnings Per Share [Line Items] | ||||
| Securities included in the computation of basic EPS | 13,000 | 68,000 | 68,000 | |
| Shares excluded from computation of EPS | 13,000 | |||
| Stock Options | ||||
| Earnings Per Share [Line Items] | ||||
| Shares excluded from computation of EPS | 6,200,000 | |||
| Securities included in the computation of diluted EPS | 6,200,000 | 6,400,000 | 6,400,000 | |
| Restricted Stock Units (RSUs) | ||||
| Earnings Per Share [Line Items] | ||||
| Shares excluded from computation of EPS | 1,500,000 | |||
| Securities included in the computation of diluted EPS | 1,500,000 | 1,800,000 | 1,800,000 | |
| Warrants outstanding | 0 | 0 | ||