Schedule of Company's Obligations Under Product Acquisitions and Licensing Agreements (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Business Acquisition, Contingent Consideration [Line Items]
Beginning Balance	$ 2,492	$ 3,886	$ 11,900
Additional obligations acquired	1,867
Adjustment to deferred liabilities	65	(32)	(297)
FX impact			(1)
Amortization of discounted liabilities	135	324	174
Payments on existing obligations	(2,524)	(1,686)	(7,890)
Ending Balance	$ 2,035	$ 2,492	$ 3,886