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Share-based payments reserve (Details 3) - US Dollars denominated stock options [member]
 3 Months Ended
Nov. 30, 2023
shares
$ / shares
IfrsStatementLineItems [Line Items]  
Exercise price | $ / shares $ 0.49 [1]
Number of options outstanding 10,450,000
Number of options exercisable 3,565,000
Remaining contractual life 4 years [1]
Range 1 [member]  
IfrsStatementLineItems [Line Items]  
Exercise price | $ / shares $ 0.50
Number of options outstanding 7,375,000
Number of options exercisable 2,950,000
Expiry date Aug. 17, 2027
Remaining contractual life 3 years 8 months 12 days
Range 2 [member]  
IfrsStatementLineItems [Line Items]  
Exercise price | $ / shares $ 0.45
Number of options outstanding 3,075,000
Number of options exercisable 615,000
Expiry date Aug. 28, 2028
Remaining contractual life 4 years 9 months 18 days
[1] Total represents weighted average.