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Inventories, Net - Schedule of Inventories, Net (Detail) - USD ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Inventory Disclosure [Abstract]    
Raw materials $ 3,220 $ 2,941
Work in process 11,668 11,771
Finished products 3,449 3,636
Total $ 18,337 $ 18,348