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Inventories, Net - Summary of Inventories (Detail) - USD ($)
$ in Thousands
Sep. 30, 2020
Dec. 31, 2019
Inventory Disclosure [Abstract]    
Raw materials $ 20,920 $ 15,198
Work-in-process 27,109 22,890
Finished goods 11,004 3,244
Total $ 59,033 $ 41,332