Intangible Assets - Summary of Intangible Assets (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Finite-Lived Intangible Assets [Line Items]
Gross carrying value	$ 14,663	$ 14,394
Accumulated amortization	(9,573)	(8,755)
Net carrying amount	5,090	5,639
Intangible assets, gross carrying value	16,741	16,532
Net	7,168	7,777
Trade names and trademarks
Finite-Lived Intangible Assets [Line Items]
Gross carrying value, indefinite lived	1,008	1,008
Patents in process
Finite-Lived Intangible Assets [Line Items]
Gross carrying value, indefinite lived	1,070	1,130
Licenses
Finite-Lived Intangible Assets [Line Items]
Gross carrying value	1,414	1,414
Accumulated amortization	(1,301)	(1,200)
Net carrying amount	113	214
Patents and know-how
Finite-Lived Intangible Assets [Line Items]
Gross carrying value	9,368	9,099
Accumulated amortization	(5,563)	(5,070)
Net carrying amount	3,805	4,029
Customer and supplier relationships
Finite-Lived Intangible Assets [Line Items]
Gross carrying value	3,761	3,761
Accumulated amortization	(2,619)	(2,417)
Net carrying amount	1,142	1,344
Non compete agreements
Finite-Lived Intangible Assets [Line Items]
Gross carrying value	120	120
Accumulated amortization	(90)	(68)
Net carrying amount	$ 30	$ 52