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SHARE CAPITAL - Disclosure of assumptions used in valuing stock options granted (Details) - Year
12 Months Ended
Aug. 31, 2021
Aug. 31, 2020
Disclosure of terms and conditions of share-based payment arrangement [abstract]    
Risk-free interest rate 0.41% 1.56%
Expected life of options (in years) 3.9 3.9
Annualized volatility 88.00% 82.00%
Forfeiture rate 2.00% 2.10%
Dividend rate 0.00% 0.00%