Stock Option Plan and Stock Based Compensation - Stock Option Activity (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended	12 Months Ended
	May. 31, 2015	Feb. 28, 2014
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Number of Shares, Options Outstanding, Beginning Balance	374,823
Number of Shares, Granted	43,426
Number of Shares, Terminated	(20,000)
Number of Shares, Exercised	0
Number of Shares, Options Outstanding, Ending Balance	398,249
Weighted Average Exercise Price, Beginning Balance	$ 15.95
Weighted Average Exercise Price, Granted	13.69
Weighted Average Exercise Price, Terminated	16.42
Weighted Average Exercise Price, Exercised	0
Weighted Average Exercise Price, Ending Balance	$ 15.68
Weighted Average Remaining Contractual Life, Ending Balance	6 years 2 months 12 days	5 years 8 months 12 days
Aggregate Intrinsic Value, Beginning Balance	$ 210
Aggregate Intrinsic Value, Ending Balance	$ 697
Number of Shares, Exercisable	321,824
Weighted Average Exercise Price, Exercisable	$ 16.00
Weighted Average Remaining Contractual Life, Exercisable	5 years 6 months
Aggregate Intrinsic Value, Exercisable	$ 506