Stock Option Plan and Stock Based Compensation - Summary of Unvested Stock Options (Detail) - $ / shares	12 Months Ended
	Feb. 28, 2019	Feb. 28, 2018	Feb. 28, 2017
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Unvested Beginning Balance, Number of Options	1,616
New grants, Number of Options	0	0	0
Vested, Number of Options	(1,616)
Unvested Ending Balance, Number of Options		1,616
Unvested Beginning Balance, Weighted Average Grant Date Fair Value	$ 2.24
Vested, Weighted Average Grant Date Fair Value	$ 2.24
Unvested Ending Balance, Weighted Average Grant Date Fair Value		$ 2.24