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Inventories - Schedule of Inventories (Detail) - USD ($)
$ in Thousands
Jun. 30, 2021
Dec. 31, 2020
Inventory Disclosure [Abstract]    
Raw materials $ 9,625 $ 8,442
Work-in-process 15,742 12,149
Finished products 14,654 29,142
Field/consignment 41,530 34,902
Inventories $ 81,551 $ 84,635