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Inventories - Components of Inventories (Detail) - USD ($)
$ in Thousands
May 31, 2020
Feb. 29, 2020
Inventory Disclosure [Abstract]    
Raw material $ 21,340 $ 20,267
Work-in-process 2,830 4,557
Finished goods 10,065 10,011
Inventories $ 34,235 $ 34,835