Intangible Assets - Amortized Intangible Assets (Detail) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	$ 73,675	$ 93,474
Accumulated Amortization	58,120	53,984
Intangible Assets, Net (Including Goodwill)	15,555
Net Carrying Value	15,555	39,490
In Process Research and Development [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value		8,200
Indefinite-lived Intangible Assets Acquired		8,200
Distribution Networks [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	38,060	38,060
Accumulated Amortization	38,060	38,060
Net Carrying Value	0	0
Completed Technologies [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	24,217	31,987
Accumulated Amortization	12,397	9,160
Net Carrying Value	11,820	22,827
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	10,578	14,407
Accumulated Amortization	7,160	6,402
Net Carrying Value	3,418	8,005
In Process Research and Development [Member]
Finite-Lived Intangible Assets [Line Items]
Accumulated Amortization		0
Non-compete agreements
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	710
Accumulated Amortization	436
Net Carrying Value	274
Trademarks [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	110	110
Accumulated Amortization	67	12
Net Carrying Value	$ 43	98
Non-compete Agreements [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value		710
Accumulated Amortization		350
Net Carrying Value		$ 360