Stock Option Plan and Stock Based Compensation - Stock Option Activity (Detail) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended	12 Months Ended
	May 31, 2014	Feb. 28, 2014
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Number of Shares, Options Outstanding, Beginning Balance	369,405
Number of Shares, Granted	31,418
Number of Shares, Terminated	(20,000)
Number of Shares, Exercised	(6,000)
Number of Shares, Options Outstanding, Ending Balance	374,823	369,405
Weighted Average Exercise Price, Beginning Balance	$ 15.86
Weighted Average Exercise Price, Granted	$ 15.78
Weighted Average Exercise Price, Terminated	$ 16.21
Weighted Average Exercise Price, Exercised	$ 8.94
Weighted Average Exercise Price, Ending Balance	$ 15.95	$ 15.86
Weighted Average Remaining Contractual Life, Ending Balance	6 years 4 months 24 days	6 years
Aggregate Intrinsic Value, Beginning Balance	$ 416
Aggregate Intrinsic Value, Ending Balance	301	416
Number of Shares, Exercisable	295,063
Weighted Average Exercise Price, Exercisable	$ 16.16
Weighted Average Remaining Contractual Life, Exercisable	5 years 9 months 18 days
Aggregate Intrinsic Value, Exercisable	$ 274