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Inventories - Components of Inventory (Detail) - USD ($)
$ in Thousands
Mar. 31, 2021
Dec. 31, 2020
Inventory Disclosure [Abstract]    
Raw materials $ 1,770 $ 1,393
Work-in-process 331 2,484
Finished goods 2,949 1,096
Total inventory $ 5,050 $ 4,973