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STOCK OPTIONS AND WARRANTS (Narrative) (Details)
1 Months Ended 3 Months Ended 9 Months Ended 12 Months Ended
Feb. 05, 2021
$ / shares
shares
Feb. 04, 2021
$ / shares
shares
Dec. 14, 2020
$ / shares
shares
Nov. 12, 2020
$ / shares
shares
May 28, 2021
$ / shares
shares
Apr. 27, 2021
$ / shares
shares
Jan. 28, 2021
$ / shares
shares
May 31, 2021
USD ($)
shares
May 31, 2021
USD ($)
$ / shares
shares
May 31, 2020
USD ($)
shares
Aug. 31, 2020
$ / shares
shares
May 31, 2021
$ / shares
May 31, 2021
USD ($)
shares
Share-based Payment Arrangement [Abstract]                          
Stock options granted (shares) 300,000 100,000 2,100,000 500,000 50,000 100,000 2,000,000   5,150,000   2,000,000    
Stock options granted exercise price | $ / shares $ 0.18 $ 0.18 $ 0.05 $ 0.05 $ 0.12 $ 0.12 $ 0.14   $ 0.10   $ 0.02    
Stock based compensation | $               $ 9,005 $ 297,691 $ 17,308      
Stock options exercised (shares)               2,920,000 2,920,000        
Proceeds from stock option exercised | $                 $ 89,048        
Stock options expired                 1,100,000 1,000,000 1,000,000    
Market price of common shares | $ / shares                       $ 0.0965  
Number of incentive stock options in the money                         7,126,776
Intrinsic value of stock options | $                         $ 263,198
Number of warrants issued                 1,500,000