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Inventory - Schedule of Inventory (Detail) - USD ($)
$ in Thousands
Mar. 31, 2021
Dec. 31, 2020
Inventory Disclosure [Abstract]    
Raw materials $ 4,390 $ 4,287
Work in process 3,138 4,666
Finished goods 5,148 6,441
Total inventories $ 12,676 $ 15,394