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BALANCE SHEET COMPONENTS - Inventory (Details) - USD ($)
$ in Thousands
Dec. 31, 2022
Dec. 31, 2021
Organization, Consolidation and Presentation of Financial Statements [Abstract]    
Work in process inventory $ 3,374 $ 20,582
Raw Materials 4,623 0
Finished Goods 376 0
Batteries 1 2,138
Inventory, net $ 8,374 $ 22,720