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STOCK-BASED COMPENSATION (Details Narrative) - USD ($)
3 Months Ended 12 Months Ended
Jun. 25, 2015
Aug. 31, 2015
May. 31, 2016
May. 31, 2015
Method used  

Black-Scholes options-pricing model

   
Warrant [Member]        
Number of gross warrant granted       622,947
Method used       Black-Scholes option pricing model
Warrant [Member] | Consulting Contract [Member]        
Number of gross warrant granted       80,666
Strike price (in dollars per share)       $ 1.20
Expected volatility       100.00%
Risk-free interest rate       1.50%
Dividend rate       0.00%
Expected term       3 years
Warrant [Member] | Consulting Contract [Member] | Maximum [Member]        
Stock price (in dollars per share)       $ 1.87
Warrant [Member] | Consulting Contract [Member] | Minimum [Member]        
Stock price (in dollars per share)       $ 0.46
Warrant [Member] | Private Placement [Member]        
Number of gross warrant granted     838,334 833,330
Chief Executive Officer And Former Director [Member]        
Number of gross option granted 1,300,000      
Vesting period 3 years      
Stock based compensation   $ 1,622,778    
Method used   Black-Scholes option pricing model    
Stock price (in dollars per share)   $ 1.75    
Strike price (in dollars per share)   $ 0.6    
Expected volatility   91.35%    
Risk-free interest rate   0.73%    
Dividend rate   0.00%    
Expected term   1 year 6 months    
Chief Executive Officer [Member]        
Number of gross option granted 1,000,000      
Weighted average exercise price $ 0.6      
Vesting period 3 years      
Former Director [Member]        
Number of gross option granted 300,000      
Weighted average exercise price $ 0.6      
Vesting period 3 years