|
Accrued Expenses and Other Long-Term Liabilities - Summary of Accrued Expenses (Detail) (USD $)
In Thousands, unless otherwise specified |
Mar. 31, 2015
|
Dec. 31, 2014
|
|---|---|---|
| Payables and Accruals [Abstract] | ||
| Accrued compensation and benefits | $ 1,448 | $ 1,687 |
| Deferred rent, current portion | 624 | 606 |
| Accrued clinical trial costs | 492 | 700 |
| Other accrued expenses | 2,026 | 2,267 |
| Total accrued expenses | $ 4,590 | $ 5,260 |