Roll Forward of Inventory Reserves (Detail) - Inventory Valuation Reserve - USD ($) $ in Thousands	12 Months Ended
	Feb. 29, 2016	Feb. 28, 2015
Inventory [Line Items]
Balance at Beginning of Period	$ 493	$ 111
Additions: Charged to Costs and Expenses	916	519
Deductions	(139)	(137)
Balance at End of Period	$ 1,270	$ 493