Goodwill and Intangible Assets, Intangible Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Intangible assets [Abstract]
Cost	$ 21,896	$ 21,540
Accumulated Amortization	(10,966)	(9,738)
Intangible assets	10,930	11,802
Intangible assets expense [Abstract]
Amortization expense of intangible assets	1,500	2,900	$ 2,300
Estimated Amortization Expense [Abstract]
2021	1,500
2022	1,500
2023	1,300
2024	1,100
2025	1,100
Held-for-sale [Member]
Intangible assets [Abstract]
Cost	2,100	18,800
Accumulated Amortization	400	13,800
Intangible assets	$ 1,700	5,000
Weighted Average [Member]
Intangible assets [Abstract]
Weighted Average Amortization Years	15 years 9 months 18 days
Technological Know-how [Member]
Intangible assets [Abstract]
Cost	$ 7,570	7,570
Accumulated Amortization	$ (1,787)	(1,391)
Technological Know-how [Member] | Weighted Average [Member]
Intangible assets [Abstract]
Weighted Average Amortization Years	17 years 9 months 18 days
Customer Relationships [Member]
Intangible assets [Abstract]
Cost	$ 3,401	3,474
Accumulated Amortization	$ (1,898)	(1,653)
Customer Relationships [Member] | Weighted Average [Member]
Intangible assets [Abstract]
Weighted Average Amortization Years	13 years 4 months 24 days
Patents, Trademarks, Non-compete Agreements and Other [Member]
Intangible assets [Abstract]
Cost	$ 10,925	10,496
Accumulated Amortization	$ (7,281)	$ (6,694)
Patents, Trademarks, Non-compete Agreements and Other [Member] | Weighted Average [Member]
Intangible assets [Abstract]
Weighted Average Amortization Years	15 years 2 months 12 days