Summary of Nonvested Options and Changes (Detail) (USD $)	3 Months Ended
	May 31, 2013
Options
Nonvested, beginning of period	3,188,104
Granted	330,000
Vested	420,000
Forfeited
Nonvested, end of period	3,098,104
Weighted Average Grant Date Fair Value
Nonvested, beginning of period	$ 0.76
Granted	$ 1.27
Vested	$ 1.00
Forfeited
Nonvested, end of period	$ 0.78