Annual report pursuant to Section 13 and 15(d)

Activity Related to Notes (Detail)

v3.2.0.727
Activity Related to Notes (Detail) - USD ($)
12 Months Ended
May. 31, 2015
May. 31, 2014
Debt Instrument [Line Items]    
Face amount of Notes $ 4,271,250 $ 7,221,250
Unamortized discount (6,529) (1,932,566)
Repayments   (500,000)
Conversions (4,221,250) (2,450,000)
Total carrying value of Notes 43,471 2,338,684
Short-term portion of Notes 43,471  
Long-term portion of Notes   2,338,684
Total carrying value of Notes 43,471 $ 2,338,684
Investor warrants    
Debt Instrument [Line Items]    
Face amount of Notes 3,981,050  
Unamortized discount (2,390,063)  
Total carrying value of Notes 1,590,987  
Total carrying value of Notes $ 1,590,987