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(Loss) earnings per share (Details Narrative) - shares
shares in Millions
3 Months Ended
Nov. 30, 2023
Nov. 30, 2022
Stock options [member]    
IfrsStatementLineItems [Line Items]    
Weighted average number of common shares 15.4 7.4
RSUs [member]    
IfrsStatementLineItems [Line Items]    
Weighted average number of common shares 2.8  
Common share awards [member]    
IfrsStatementLineItems [Line Items]    
Weighted average number of common shares 4.6  
Warrants [member]    
IfrsStatementLineItems [Line Items]    
Weighted average number of common shares 39.0 42.0