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Inventories - Components of Inventories (Detail) - USD ($)
$ in Thousands
Nov. 30, 2019
Feb. 28, 2019
Inventory Disclosure [Abstract]    
Raw material $ 21,658 $ 21,717
Work-in-process 4,829 4,172
Finished goods 10,054 9,522
Inventories $ 36,541 $ 35,411