Balance Sheet Account Detail - Schedule of Amounts Presented in Accounts Payable and Other Accrued Liabilities (Detail) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2016	Dec. 31, 2015
Rebates and Chargebacks [Member]
Accounts Payable and Other Liabilities [Roll Forward]
Beginning balance	$ 20,167	$ 45,822
Add: provisions	19,952	75,498
(Less): credits or actual allowances	(31,900)	(101,153)
Ending balance	8,219	20,167
Data and Distribution, GPO Fees, and Inventory Management Fees [Member]
Accounts Payable and Other Liabilities [Roll Forward]
Beginning balance	3,386	8,284
Add: provisions	2,227	15,928
(Less): credits or actual allowances	(3,755)	(20,826)
Ending balance	1,858	3,386
Returns [Member]
Accounts Payable and Other Liabilities [Roll Forward]
Beginning balance	1,394	1,135
Add: provisions	590	1,486
(Less): credits or actual allowances	(555)	(1,227)
Ending balance	$ 1,429	$ 1,394