Intangible Assets (Detail) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2017	Dec. 31, 2016
Acquired Intangible Assets by Major Class [Line Items]
Trademarks, net	$ 2,608	$ 2,608
Amortized Intangible Assets, Gross Carrying Amount	76,575	76,575
Amortized Intangible Assets, Accumulated Amortization	(47,714)	(43,464)
Amortized Intangible Assets, Net Amount	$ 28,861	33,111
Licenses
Acquired Intangible Assets by Major Class [Line Items]
Weighted Useful Lives (Years)	5 years 9 months 22 days
Amortized Intangible Assets, Gross Carrying Amount	$ 20,130	20,130
Amortized Intangible Assets, Accumulated Amortization	(17,833)	(17,248)
Amortized Intangible Assets, Net Amount	$ 2,297	2,882
Product Lines
Acquired Intangible Assets by Major Class [Line Items]
Weighted Useful Lives (Years)	7 years 6 months
Amortized Intangible Assets, Gross Carrying Amount	$ 50,093	50,093
Amortized Intangible Assets, Accumulated Amortization	(23,807)	(20,634)
Amortized Intangible Assets, Net Amount	$ 26,286	29,459
Customer relationships
Acquired Intangible Assets by Major Class [Line Items]
Weighted Useful Lives (Years)	4 years 10 months 25 days
Amortized Intangible Assets, Gross Carrying Amount	$ 3,152	3,152
Amortized Intangible Assets, Accumulated Amortization	(2,927)	(2,755)
Amortized Intangible Assets, Net Amount	$ 225	397
Trade Name
Acquired Intangible Assets by Major Class [Line Items]
Weighted Useful Lives (Years)	5 years
Amortized Intangible Assets, Gross Carrying Amount	$ 3,000	3,000
Amortized Intangible Assets, Accumulated Amortization	(2,950)	(2,650)
Amortized Intangible Assets, Net Amount	$ 50	350
Non-compete agreements
Acquired Intangible Assets by Major Class [Line Items]
Weighted Useful Lives (Years)	5 years
Amortized Intangible Assets, Gross Carrying Amount	$ 200	200
Amortized Intangible Assets, Accumulated Amortization	(197)	(177)
Amortized Intangible Assets, Net Amount	$ 3	$ 23