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BALANCE SHEET COMPONENTS - Components of Inventory (Details) - USD ($)
$ in Thousands
Mar. 31, 2023
Dec. 31, 2022
Balance Sheet Components [Abstract]    
Purchased materials $ 25,475 $ 24,139
Work in process 21,705 14,062
Finished goods 14,775 12,180
Inventory, net $ 61,955 $ 50,381