Share Based Payments Summary of Nonvested Options and Changes (Detail) (USD $)	3 Months Ended
	May 31, 2014
Options
Nonvested, beginning of period	3,325,481
Granted	215,000
Vested	562,501
Forfeited	10,000
Nonvested, end of period	2,967,980
Weighted Average Grant Date Fair Value
Nonvested, beginning of period	$ 0.98
Granted	$ 1.84
Vested	$ 0.94
Forfeited	$ 0.57
Nonvested, end of period	$ 1.05