Stock Option Activity (Detail) (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Feb. 28, 2013	Feb. 29, 2012	Feb. 28, 2011
Options Outstanding
Granted	200,000	200,000	200,000
Exercised		(22,304)
Weighted Average Exercise Price
Beginning Balance	$ 5.84
Granted	$ 8.75
Exercised
Canceled/Forfeited	$ 11.00
Ending Balance	$ 6.57	$ 5.84
Exercisable as of February 28, 2013	$ 8.10
Vested or Expected to Vest as of February 28, 2013	$ 6.57
Aggregate Intrinsic Value
Beginning Balance	$ 1,472
Ending Balance	2,479	1,472
Vested or Expected to Vest as of February 28, 2013	$ 2,479
Director
Options Outstanding
Beginning Balance	18,087
Exercised
Canceled/Forfeited	(14,550)
Ending Balance	3,537
Exercisable as of February 28, 2013	3,537
Vested or Expected to Vest as of February 28, 2013	3,537
Key Employees
Options Outstanding
Beginning Balance	488,138
Granted	200,000
Exercised
Ending Balance	688,138
Exercisable as of February 28, 2013	113,138
Vested or Expected to Vest as of February 28, 2013	688,138