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Inventory - Schedule of Inventory (Detail) - USD ($)
$ in Thousands
Sep. 30, 2020
Dec. 31, 2019
Inventory Disclosure [Abstract]    
Raw materials $ 32,956 $ 19,455
Work in process 23,386 12,031
Finished goods 92,189 45,283
Total inventory $ 148,531 $ 76,769