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SHARE CAPITAL - Disclosure of detailed information about outstanding stock options (Details) - Share
12 Months Ended
Aug. 31, 2020
Aug. 31, 2019
Aug. 31, 2018
Disclosure of number and weighted average remaining contractual life of outstanding share options [line items]      
Quantity Outstanding 9,028,904 8,833,194 7,709,746
Weighted Average Remaining Contractual Life (years) 7 years 6 months    
Number of share options exercisable in share-based payment arrangement 6,473,114    
$0.30-$1.48 [Member]      
Disclosure of number and weighted average remaining contractual life of outstanding share options [line items]      
Quantity Outstanding 1,440,599    
Weighted Average Remaining Contractual Life (years) 4 years 8 months 12 days    
Number of share options exercisable in share-based payment arrangement 1,376,683    
$1.49-$2.38 [Member]      
Disclosure of number and weighted average remaining contractual life of outstanding share options [line items]      
Quantity Outstanding 2,204,333    
Weighted Average Remaining Contractual Life (years) 7 years 6 months    
Number of share options exercisable in share-based payment arrangement 1,652,833    
$2.39-$4.65 [Member]      
Disclosure of number and weighted average remaining contractual life of outstanding share options [line items]      
Quantity Outstanding 2,069,854    
Weighted Average Remaining Contractual Life (years) 7 years 10 months 24 days    
Number of share options exercisable in share-based payment arrangement 1,217,504    
$4.66-$7.67 [Member]      
Disclosure of number and weighted average remaining contractual life of outstanding share options [line items]      
Quantity Outstanding 1,886,518    
Weighted Average Remaining Contractual Life (years) 8 years 2 months 12 days    
Number of share options exercisable in share-based payment arrangement 1,276,194    
$7.68-$11.27 [Member]      
Disclosure of number and weighted average remaining contractual life of outstanding share options [line items]      
Quantity Outstanding 1,427,600    
Weighted Average Remaining Contractual Life (years) 8 years 8 months 12 days    
Number of share options exercisable in share-based payment arrangement 949,900