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Balance sheet components - Inventory (Detail) - USD ($)
$ in Thousands
Sep. 30, 2021
Sep. 30, 2020
Balance sheet components    
Raw Materials $ 18,778 $ 9,237
Work-in-process 4,837 2,021
Finished Goods 8,185 1,031
Total inventories 31,800 $ 12,289
Work-in-process inventory included gross consigned $ 1,900