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Reconciliation of Liability Measured at Fair Value on Recurring Basis Using Significant Unobservable Inputs (Level 3) (Detail) - USD ($)
12 Months Ended
May 31, 2016
May 31, 2015
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Beginning Balance $ 2,008,907  
Fair value adjustments (646,505) $ 838,643
Ending Balance   2,008,907
Note issuance, September 26, 2014    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Note issuance   767,038
Note issuance, February 6, 2015    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Note issuance   $ 403,226
Conversion Features One    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Note conversion (521,133)  
Conversion Features Two    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Note conversion $ (841,269)