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Balance Sheet Components - Inventories (Detail) - USD ($)
$ in Thousands
Jun. 30, 2022
Dec. 31, 2021
Balance Sheet Components [Abstract]    
Raw materials $ 5,425 $ 10,616
Work-in-process 57,753 45,662
Finished goods 2,638 1,924
Total inventories $ 65,816 $ 58,202