Share Based Payments Summary of Nonvested Options and Changes (Detail) (USD $)	6 Months Ended
	Aug. 31, 2014
Options
Nonvested, beginning of period	3,325,481
Granted	561,219
Vested	594,209
Forfeited	25,000
Nonvested, end of period	3,267,491
Weighted Average Grant Date Fair Value
Nonvested, beginning of period	$ 0.98
Granted	$ 1.64
Vested	$ 0.96
Forfeited	$ 0.57
Nonvested, end of period	$ 1.10