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Intangible Assets - Intangible Assets (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Dec. 31, 2020
Finite-Lived Intangible Assets [Line Items]
Intangible assets, gross	$ 31,035	$ 29,286
Accumulated amortization	(10,549)	(10,038)
Total intangible assets, net	20,486	19,248
Tradename [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets, gross	$ 555	555
Tradename [Member] | Minimum [Member]
Finite-Lived Intangible Assets [Line Items]
Estimated useful lives (in years)	5 years
Tradename [Member] | Maximum [Member]
Finite-Lived Intangible Assets [Line Items]
Estimated useful lives (in years)	7 years
Patents and technological know-how [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets, gross	$ 27,176	25,427
Patents and technological know-how [Member] | Minimum [Member]
Finite-Lived Intangible Assets [Line Items]
Estimated useful lives (in years)	10 years
Patents and technological know-how [Member] | Maximum [Member]
Finite-Lived Intangible Assets [Line Items]
Estimated useful lives (in years)	20 years
Proprietary software [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets, gross	$ 2,981	2,981
Proprietary software [Member] | Minimum [Member]
Finite-Lived Intangible Assets [Line Items]
Estimated useful lives (in years)	3 years
Proprietary software [Member] | Maximum [Member]
Finite-Lived Intangible Assets [Line Items]
Estimated useful lives (in years)	15 years
Other [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets, gross	$ 323	$ 323
Other [Member] | Minimum [Member]
Finite-Lived Intangible Assets [Line Items]
Estimated useful lives (in years)	3 years
Other [Member] | Maximum [Member]
Finite-Lived Intangible Assets [Line Items]
Estimated useful lives (in years)	5 years

X

- Definition

Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

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- Definition

Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 2
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275

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- Definition

Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 928
-SubTopic 340
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6473545&loc=d3e61844-108004

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

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- Definition

Amount after amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 926
-SubTopic 20
-Section 50
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=120154696&loc=d3e54445-107959

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