Goodwill and Intangible Assets, Net - Components of Intangible Assets (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Finite-Lived Intangible Assets, Net [Abstract]
Gross	$ 67,404	$ 64,708
Accumulated Amortization	(48,217)	(44,878)
Net	19,187	19,830
Gross value of fully amortized intangible assets	7,600	7,400
Distribution rights
Finite-Lived Intangible Assets, Net [Abstract]
Gross	322	322
Accumulated Amortization	(224)	(210)
Net	98	112
Patents
Finite-Lived Intangible Assets, Net [Abstract]
Gross	19,250	16,587
Accumulated Amortization	(7,026)	(6,491)
Net	12,224	10,096
Trademarks and trade names
Finite-Lived Intangible Assets, Net [Abstract]
Gross	2,785	2,785
Accumulated Amortization	(2,358)	(2,205)
Net	427	580
Developed and core technology
Finite-Lived Intangible Assets, Net [Abstract]
Gross	12,480	12,480
Accumulated Amortization	(11,014)	(10,016)
Net	1,466	2,464
Capitalized software development costs
Finite-Lived Intangible Assets, Net [Abstract]
Gross	33	0
Accumulated Amortization	0	0
Net	33	0
Customer relationships
Finite-Lived Intangible Assets, Net [Abstract]
Gross	32,534	32,534
Accumulated Amortization	(27,595)	(25,956)
Net	$ 4,939	$ 6,578