Inventories - Additional Information (Detail) (USD $)	12 Months Ended
	Feb. 28, 2014	Feb. 28, 2013
Inventory [Line Items]
Disposal of Inventory	$ 1,800,000
Inventory reserve	111,000	2,679,000
Lexel Imaging, Inc.
Inventory [Line Items]
Value of inventories guaranteed to purchase	2,900,000
Purchase commitment period	5 years
Clinton settlement
Inventory [Line Items]
Disposal of Inventory	5,300,000	400,000
Inventory reserve	$ 3,200,000