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Components of Inventories (Detail) - USD ($)
$ in Thousands
Mar. 31, 2021
Mar. 31, 2020
Inventory Disclosure [Abstract]    
Raw materials and supplies $ 27,782 $ 31,411
Work-in-progress 35,187 35,008
Finished goods 18,090 23,669
Inventories $ 81,059 $ 90,088