Stock Option Plan and Stock Based Compensation - Summary of Unvested Stock Options (Detail) - $ / shares	12 Months Ended
	Feb. 28, 2017	Feb. 29, 2016	Feb. 28, 2015
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Unvested Beginning Balance, Number of Options	76,425
New grants, Number of Options	0	43,426	31,418
Vested, Number of Options	(71,352)
Forfeited, Number of Options	0
Unvested Ending Balance, Number of Options	5,073	76,425
Unvested Beginning Balance, Weighted Average Grant Date Fair Value	$ 2.32
New grants, Weighted Average Grant Date Fair Value	0	$ 2.24	$ 2.70
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	$ 2.32