Share capital - Authorized unlimited common shares, no par value (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		12 Months Ended
	Feb. 28, 2025	Feb. 29, 2024	Nov. 30, 2024
Share capital
Unlimited common shares authorized	Unlimited		Unlimited
Common Stock, No Par Value	$ 0		$ 0
Exercise of options, Number of shares	263,333	0
Exercise of options, Ascribed value	$ 131
Services settled by common shares, Ascribed value	$ 30	$ 30
Share capital
Share capital
Beginning balance, Number of shares	161,085,313
Beginning balance, Ascribed value	$ 190,503
Exercise of options, Number of shares	263,333
Exercise of options, Ascribed value	$ 195
Restricted share units, Number of shares	2,647,945	3,633,065
Restricted share units, Ascribed value	$ 1,863
Services settled by common shares, Number of shares	24,260	64,368
Services settled by common shares, Ascribed value	$ 30	$ 30
Ending balance, Number of shares outstanding	164,020,851		161,085,313
Ending balance, Ascribed value	$ 192,591		$ 190,503