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v3.20.4

Cost of Sales (Details) - USD ($) $ in Thousands | 12 Months Ended
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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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Balance Type: | debit
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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 + Details
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