Inventories (Detail) (USD $) In Thousands, unless otherwise specified	Feb. 28, 2014	Feb. 28, 2013
Inventory [Line Items]
Raw materials	$ 7,906	$ 7,447
Work-in-process	242	694
Finished goods	1,878	5,711
Inventory, Gross	10,026	13,852
Reserves for obsolescence	(111)	(2,679)
Inventory, Net	$ 9,915	$ 11,173