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Balance Sheet Details - Schedule of Inventory (Detail) - USD ($)
$ in Thousands
Sep. 30, 2021
Dec. 31, 2020
Inventory Disclosure [Abstract]    
Finished goods $ 1,449 $ 1,453
Work in process 6,670 6,367
Raw material 6,217 1,862
Inventory $ 14,336 $ 9,682