Accrued Expenses and Other Liabilities - Schedule of Accrued Expenses and Other Liabilities (Detail) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Payables and Accruals [Abstract]
Compensation and benefits	$ 11,152	$ 11,198
Accrued interest	94	4,994
Accrued professional fees	1,561	1,508
Research and development services	174	248
Freight, distribution and operations	3,199	3,069
Marketing expense	970	978
Accrued rebates, discounts and chargebacks	2,292	2,164
Other	526	704
Accrued expenses	$ 19,968	$ 24,863