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Share capital - Stock options outstanding (Details)
 3 Months Ended
Feb. 28, 2026
$ / shares
shares
Share capital  
Number of outstanding options | shares 9,935,250
Weighted average years to expiry 2 years 9 months 14 days
Weighted average exercise price outstanding $ 2.01
Number of exercisable options | shares 8,500,245
Weighted average exercise price exercisable $ 1.56
Number of unvested options | shares 1,435,005
$0.59 to $1.00  
Share capital  
Exercise price lower range limit $ 0.59
Exercise price upper range limit $ 1
Number of outstanding options | shares 5,165,000
Weighted average years to expiry 2 years 3 months
Weighted average exercise price outstanding $ 0.69
Number of exercisable options | shares 5,165,000
Weighted average exercise price exercisable $ 0.69
Number of unvested options | shares 0
$1.01 to $2.00  
Share capital  
Exercise price lower range limit $ 1.01
Exercise price upper range limit $ 2
Number of outstanding options | shares 1,935,000
Weighted average years to expiry 3 years 9 months 10 days
Weighted average exercise price outstanding $ 1.52
Number of exercisable options | shares 1,393,332
Weighted average exercise price exercisable $ 1.52
Number of unvested options | shares 541,668
$2.01 to $3.00  
Share capital  
Exercise price lower range limit $ 2.01
Exercise price upper range limit $ 3
Number of outstanding options | shares 1,180,250
Weighted average years to expiry 9 months 7 days
Weighted average exercise price outstanding $ 2.21
Number of exercisable options | shares 1,180,250
Weighted average exercise price exercisable $ 2.21
Number of unvested options | shares 0
$3.01 to $7.85  
Share capital  
Exercise price lower range limit $ 3.01
Exercise price upper range limit $ 7.85
Number of outstanding options | shares 1,655,000
Weighted average years to expiry 4 years 9 months 18 days
Weighted average exercise price outstanding $ 6.53
Number of exercisable options | shares 761,663
Weighted average exercise price exercisable $ 6.48
Number of unvested options | shares 893,337