Accounts Payable and Accrued Liabilities - Summary of Components of Accounts Payable and Accrued Liabilities (Detail) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Payables and Accruals [Abstract]
Accounts payable	$ 9,397	$ 10,177
Accrued price adjustments	592	2,207
Accrued rebates	3,842	2,581
Accrued chargebacks	10	65
Accrued compensation and benefits	2,052	1,917
Accrued royalties	518	431
Accrued clinical trial costs	615	584
Accrued legal	490
Accrued manufacturing costs	200	183
Accrued sales and marketing costs	193	880
Accrued other	265	476
Total accounts payable and accrued expenses	$ 18,174	$ 19,501