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Inventories - Components of Inventory (Detail) - USD ($)
$ in Thousands
Jun. 30, 2021
Dec. 31, 2020
Inventory Disclosure [Abstract]    
Raw materials $ 2,479 $ 1,393
Work-in-process 3,095 2,484
Finished goods 1,908 1,096
Total inventory $ 7,482 $ 4,973