Balance Sheet Account Detail - Schedule of Accounts Payable and Other Accrued Liabilities (Detail) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Trade accounts payable and other accrueds	$ 18,180	$ 24,571
Accrued rebates	39,502	41,782
Accrued product royalty	3,009	5,182
Allowance for returns	1,586	1,135
Accrued data and distribution fees	2,729	3,952
Accrued GPO administrative fees	2,843	3,222
Inventory management fee	660	1,110
Allowance for chargebacks	3,314	4,040
Accounts payable and other accrued liabilities	$ 71,823	$ 84,994