Annual report pursuant to Section 13 and 15(d)

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)

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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 ($)
12 Months Ended
May 31, 2016
May 31, 2015
Debt Instrument [Line Items]    
Beginning Balance $ 4,862,257  
Amortization Debt Discount 94,344 $ 523,614
Change in Fair Value (646,505) 838,643
Ending Balance   4,862,257
Warrants (equity allocation)    
Debt Instrument [Line Items]    
Beginning Balance 215,732  
Ending Balance   215,732
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   2,008,907
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   $ 2,637,618
Accrued Unpaid Interest    
Debt Instrument [Line Items]    
Conversion $ (35,627)