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Inventories, Net - Summary of Inventories (Detail) - USD ($)
$ in Thousands
Dec. 31, 2019
Dec. 31, 2018
Inventory Disclosure [Abstract]    
Raw materials $ 15,198 $ 12,111
Work-in-process 22,890 6,562
Finished goods 3,244 349
Total $ 41,332 $ 19,022