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Inventories - Summary of Inventories (Detail) - USD ($)
$ in Thousands
Sep. 30, 2020
Dec. 31, 2019
Inventory Disclosure [Abstract]    
Raw materials $ 43,165 $ 35,901
Work-in-process 8,090 5,184
Finished goods 6,914 8,102
Net balance $ 58,169 $ 49,187