Income Taxes - Components of Income Taxes (Benefit) (Detail) - USD ($) $ in Thousands |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2016 |
Dec. 31, 2015 |
Dec. 31, 2014 |
|
| Current: | |||
| Federal | $ 0 | $ 0 | $ 0 |
| State | (468) | (397) | (201) |
| Total Current | (468) | (397) | (201) |
| Deferred: | |||
| Federal | 0 | 0 | 0 |
| State | 0 | 0 | 0 |
| Total Deferred | 0 | 0 | 0 |
| Benefit from income taxes | $ (468) | $ (397) | $ (201) |