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Allocation of Cash Proceeds Derivative Liability at Its Fair Value and Warrant at Its Relative Fair Value, with Residual Allocation of Host AVCP Note Agreement (Detail) - USD ($)
3 Months Ended 6 Months Ended
Nov. 30, 2014
Nov. 30, 2015
Nov. 30, 2014
Debt Instrument [Line Items]      
Beginning Balance   $ 4,862,257  
Amortization Debt Discount $ 60,699 94,344 $ 60,699
Change in Fair Value $ 805,575 (646,505) $ 805,575
Conversion   (35,627)  
Ending Balance      
Warrants (equity allocation)      
Debt Instrument [Line Items]      
Beginning Balance   215,732  
Ending Balance      
Loss On Debt Extinguishment      
Debt Instrument [Line Items]      
Conversion   (584,177)  
Compound Embedded Derivative      
Debt Instrument [Line Items]      
Beginning Balance   2,008,907  
Change in Fair Value   (646,505)  
Conversion   (1,362,402)  
Ending Balance      
Common Stock Issued      
Debt Instrument [Line Items]      
Conversion   4,714,168  
AVCP Convertible note payable      
Debt Instrument [Line Items]      
Beginning Balance   2,637,618  
Amortization Debt Discount   94,344  
Conversion   $ (2,731,962)  
Ending Balance