Accounts Payable and Other Accrued Expenses - Schedule of Accounts Payable and Other Accrued Expenses (Detail) - USD ($) $ in Thousands |
Sep. 30, 2016 |
Dec. 31, 2015 |
|---|---|---|
| Payables And Accruals [Abstract] | ||
| Accounts payable | $ 5,560 | $ 766 |
| Accrued legal costs | 161 | 615 |
| Accrued compensation | 2,263 | 1,323 |
| Intermezzo payable | 938 | 288 |
| Accrued professional fees | 644 | 874 |
| Accrued contract manufacturing | 2,636 | 2,443 |
| Accrued other | 307 | 134 |
| Total | $ 12,509 | $ 6,443 |