Stock Option Plan and Stock Based Compensation - Stock Option Activity (Detail) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended
	May 31, 2013
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Number of Shares, Options Outstanding, Beginning Balance	363,000
Number of Shares, Granted	36,155
Number of Shares, Terminated	(3,750)
Number of Shares, Exercised
Number of Shares, Options Outstanding, Ending Balance	395,405
Weighted Average Exercise Price, Beginning Balance	$ 15.79
Weighted Average Exercise Price, Granted	$ 14.05
Weighted Average Exercise Price, Terminated	$ 11.67
Weighted Average Exercise Price, Exercised
Weighted Average Exercise Price, Ending Balance	$ 15.67
Weighted Average Remaining Contractual Life, Beginning Balance	6 years 4 months 24 days
Weighted Average Remaining Contractual Life, Ending Balance	6 years 6 months
Aggregate Intrinsic Value, Beginning Balance	$ 421
Aggregate Intrinsic Value, Ending Balance	762
Number of Shares, Exercisable	283,194
Weighted Average Exercise Price, Exercisable	$ 15.73
Weighted Average Remaining Contractual Life, Exercisable	5 years 6 months
Aggregate Intrinsic Value, Exercisable	$ 572