Share Based Payments Summary of Stock Options Outstanding and Activity (Detail) $ / shares in Units, $ in Thousands	12 Months Ended
	Feb. 28, 2018 USD ($) $ / shares shares
Options
Outstanding, beginning of period (in shares) | shares	2,559,643
Granted (in shares) | shares	341,250
Exercised (in shares) | shares	52,250	[1]
Forfeited (in shares) | shares	33,330
Expired (in shares) | shares	123,984
Outstanding, end of period (in shares) | shares	2,691,329
Exercisable, end of period (in shares) | shares	2,000,215
Price
Outstanding, beginning of period (in dollars per share) | $ / shares	$ 5.17
Granted (in dollars per share) | $ / shares	2.79
Exercised (in dollars per share) | $ / shares	2.51	[1]
Forfeited (in dollars per share) | $ / shares	4.20
Expired or exchanged (in dollars per share) | $ / shares	11.06
Outstanding, end of period (in dollars per share) | $ / shares	4.66
Exercisable, end of period (in dollars per share) | $ / shares	$ 4.78
Weighted Average Remaining Contractual Term, Outstanding	6 years 4 months 26 days
Weighted Average Remaining Contractual Term, Exercisable, end of period	5 years 9 months 22 days
Aggregate Intrinsic Value, Outstanding, end of period | $	$ 2,548
Aggregate Intrinsic Value, Exercisable, end of period | $	$ 1,822

[1] The Company did not record an income tax benefit related to option exercises in the years ended February 2016, 2017 and 2018. Cash received from option exercises during the years ended February 2016, 2017 and 2018 was $0.1 million, $0.1 million and $0.1 million, respectively.