Property, Plant and Equipment - Construction in progress (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
EV cell line
Property, Plant and Equipment
Construction in progress	$ 1,083	$ 2,010
Other cell development equipment
Property, Plant and Equipment
Construction in progress	2,703	2,206
Electrolyte production and development equipment
Property, Plant and Equipment
Construction in progress	$ 27,531	$ 35,820

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.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 360
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482099/360-10-50-1

Name:	us-gaap_ConstructionInProgressGross
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant