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Inventory - Summary of Components of Inventory (Detail) - USD ($)
$ in Thousands
Sep. 30, 2021
Dec. 31, 2020
Inventory Disclosure [Abstract]    
Raw materials $ 40,156 $ 71,717
Work in progress 221,479 139,704
Finished goods 26,834 20,540
Total inventory $ 288,469 $ 231,961