Schedule II - Valuation and Qualifying Accounts and Reserves (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Valuation Allowance of Deferred Tax Assets [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at beginning of the period	$ 72,061	$ 53,663	$ 29,580
Charged to income	0	0	0
Charged to other accounts	12,899	18,398	24,083
Balance at end of the period	84,960	72,061	$ 53,663
Allowance For Rebates [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at beginning of the period	231
Charged to income	0	0
Charged to other accounts	2,725	231
Deductions	(375)
Balance at end of the period	2,581	231
Allowance For Price Adjustments And Chargebacks [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at beginning of the period	1,108
Charged to income	0	0
Charged to other accounts	6,894	1,542
Deductions	(5,730)	(434)
Balance at end of the period	$ 2,272	$ 1,108