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Intangible Assets - Components of Intangible Assets (Details) - USD ($) $ in Thousands	1 Months Ended	12 Months Ended
	Jan. 31, 2019	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Intangible assets consist of:
Intangible assets, net		$ 1,515	$ 1,181
Cost of goods sold		17,349	12,923	$ 9,311
Amortization of intangible assets	$ 104	123	77	$ 79
Future amortization of patents and license agreements
Intangible assets, net		1,515	1,181
License Agreements
Intangible assets consist of:
Finite-lived intangible assets, gross		1,067	1,034
Less: accumulated amortization		(647)	(553)
Intangible assets, net		420	481
Future amortization of patents and license agreements
Intangible assets, net		$ 420	481
License Agreements \| Minimum
Intangible assets consist of:
Amortization period of intangible assets		17 years
License Agreements \| Maximum
Intangible assets consist of:
Amortization period of intangible assets		20 years
Patents
Intangible assets consist of:
Finite-lived intangible assets, gross		$ 845	500
Less: accumulated amortization		(84)	(55)
Intangible assets, net		761	445
Future amortization of patents and license agreements
Intangible assets, net		$ 761	445
Patents \| Maximum
Intangible assets consist of:
Amortization period of intangible assets		20 years
Trademarks
Intangible assets consist of:
Finite-lived intangible assets, gross		$ 334	$ 255
Patents And License Agreements
Intangible assets consist of:
Intangible assets, net		1,181
Future amortization of patents and license agreements
2020		137
2021		137
2022		138
2023		119
2024		47
Thereafter		603
Intangible assets, net		$ 1,181