Quarterly report pursuant to Section 13 or 15(d)

Stock Options and Warrants (Detail)

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Stock Options and Warrants (Detail) (USD $)
 3 Months Ended 12 Months Ended
Aug. 31, 2014
May 31, 2014
Stock option and warrant activity    
Options and warrants outstanding, Number of Shares 30,806,361  
Granted, Number of Shares 300,000  
Exercised, Number of Shares     
Forfeited /expired/ cancelled, Number of Shares (170,000)  
Options and warrants outstanding, Number of Shares 30,936,361 30,806,361
Outstanding exercisable - Number of Shares 29,519,694  
Options and warrants outstanding, Weighted Average Exercise Price $ 1.13  
Granted, Weighted Average Exercise Price $ 0.66  
Exercised, Weighted Average Exercise Price     
Forfeited/expired/cancelled, Weighted Average Exercise Price $ 1.27  
Options and warrants outstanding, Weighted Average Exercise Price $ 1.13 $ 1.13
Outstanding exercisable, Weighted Average Exercise Price $ 1.14  
Options and warrants outstanding, Weighted Average Remaining Contractual Life 3 years 22 days 3 years 3 months 15 days
Outstanding exercisable, Weighted Average Remaining Contractual Life 3 years 7 days  
Options and warrants outstanding , Aggregate Intrinsic Value $ 2,238,219 $ 177,042
Exercisable , Aggregate Intrinsic Value $ 2,091,969