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Inventories - Components of Inventories (Detail) - USD ($)
$ in Thousands
May 31, 2017
Feb. 28, 2017
Inventory Disclosure [Abstract]    
Raw material $ 16,986 $ 16,130
Work-in-process 3,397 3,199
Finished goods 8,866 8,636
Inventories $ 29,249 $ 27,965