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Partnerships - General Information (Details)	1 Months Ended
	Dec. 31, 2021	Aug. 31, 2021	Feb. 28, 2021
Hyundai Motor Company [Member]
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Joint development agreements, period		3 years
Director [Member] | GM Global Technology Operations LLC, Affiliate of General Motors Ventures LLC and General Motors Holdings LLC [Member]
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Joint development agreements, period			3 years
Investor [Member] | Honda Motor Company, Ltd. [Member]
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Joint development agreements, period	2 years

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Joint Development Agreements, Period

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 808
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479402/808-10-50-1

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