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Cost of Sales (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Inventory
Cost of product sales	$ 5,166	$ 20,011	$ 11,885
Lower of cost or NRV adjustments	7,802	10,264	318
Cost of sales	$ 12,968	$ 30,275	$ 12,203

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- Definition

Total costs related to goods produced and sold during the reporting period.

+ References

No definition available.

+ Details

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- Definition

The aggregate costs related to goods produced and sold and services rendered by an entity during the reporting period. This excludes costs incurred during the reporting period related to financial services rendered and other revenue generating activities.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.2(a),(d))
-URI http://asc.fasb.org/extlink&oid=116634182&loc=SL114868664-224227

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