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Property, Plant and Equipment - Construction in progress (Details) - USD ($) $ in Thousands | Mar. 31, 2023 | Dec. 31, 2022
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Louisville, Colorado - 2nd cell pilot line |  |
Property, Plant and Equipment |  |
Construction in progress | $ 2,010 | $ 2,010
Louisville, Colorado - Other capital projects |  |
Property, Plant and Equipment |  |
Construction in progress | 2,431 | 2,206
Thornton, Colorado - Increased electrolyte production scale |  |
Property, Plant and Equipment |  |
Construction in progress | $ 29,053 | $ 35,820

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- Definition Amount of structure or a modification to a structure under construction. Includes recently completed structures or modifications to structures that have not been placed into service. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229 + Details
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