Accounts Payable and Accrued Liabilities - Summary of Components of Accounts Payable and Accrued Liabilities (Detail) - USD ($) $ in Thousands |
Dec. 31, 2015 |
Dec. 31, 2014 |
|---|---|---|
| Payables and Accruals [Abstract] | ||
| Accounts payable | $ 10,177 | $ 9,072 |
| Accrued price adjustments | 2,207 | 1,094 |
| Accrued rebates | 2,581 | 231 |
| Accrued chargebacks | 65 | 14 |
| Accrued compensation and benefits | 1,917 | 945 |
| Accrued royalties | 431 | 770 |
| Accrued clinical trial costs | 584 | 36 |
| Accrued manufacturing costs | 183 | 427 |
| Accrued sales and marketing costs | 880 | 1,163 |
| Accrued other | 476 | 677 |
| Total accounts payable and accrued expenses | $ 19,501 | $ 14,429 |