Stock Option Plan and Stock Based Compensation - Summary of Unvested Stock Options (Detail) - $ / shares	3 Months Ended
	May 31, 2016	May 31, 2015
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Unvested Beginning Balance, Number of Options	76,425
New grants, Number of Options	0
Vested, Number of Options	(71,352)
Forfeited, Number of Options	0
Unvested Ending Balance, Number of Options	5,073
Unvested Beginning Balance, Weighted Average Grant Date Fair Value	$ 2.32
New grants, Weighted Average Grant Date Fair Value	0	$ 2.24
Vested, Weighted Average Grant Date Fair Value	2.32
Forfeited, Weighted Average Grant Date Fair Value	0
Unvested Ending Balance, Weighted Average Grant Date Fair Value	$ 2.41