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Components of Inventory (Detail) - USD ($)
$ in Thousands
Jun. 30, 2021
Dec. 31, 2020
Components of inventory, net of allowances    
Raw materials $ 4,346 $ 3,721
Work-in-process 1,601 1,158
Finished goods 6,768 6,278
Inventory $ 12,715 $ 11,157