Goodwill and Intangible Assets - Intangible Assets Activity Summary (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	$ 11,285	$ 14,394
Accumulated amortization	(7,334)	(8,755)
Net carrying amount	3,951	5,639
Total intangible assets, gross carrying amount	13,338	16,532
Total intangible assets, net carrying amount	6,004	7,777
Tradenames and trademarks
Indefinite-lived Intangible Assets [Line Items]
Gross carrying value, indefinite lived	1,008	1,008
Patents in process
Indefinite-lived Intangible Assets [Line Items]
Gross carrying value, indefinite lived	1,045	1,130
Licenses
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	1,414	1,414
Accumulated amortization	(1,334)	(1,200)
Net carrying amount	80	214
Patents and know-how
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	9,510	9,099
Accumulated amortization	(5,730)	(5,070)
Net carrying amount	3,780	4,029
Customer and supplier relationships
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	241	3,761
Accumulated amortization	(172)	(2,417)
Net carrying amount	69	1,344
Non-compete agreements
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	120	120
Accumulated amortization	(98)	(68)
Net carrying amount	$ 22	$ 52