Share capital - Authorized unlimited common shares, no par value (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		12 Months Ended
	Feb. 29, 2024	Feb. 28, 2023	Nov. 30, 2023
Class of Stock [Line Items]
Unlimited common shares authorized	Unlimited		Unlimited
Common Stock, No Par Value	$ 0		$ 0
Services settled by common shares, Ascribed value	$ 30	$ 4
Number of shares, issued	159,766,930		155,925,990
Share capital
Class of Stock [Line Items]
Restricted share units, Number of shares	3,633,065	2,346,366
Restricted share units, Ascribed value	$ 1,804
Services settled by common shares, Number of shares	64,368	7,793
Services settled by common shares, Ascribed value	$ 30	$ 4
Joint venture equity contribution (note 3(b)), Number of shares	143,507	143,505
Joint venture equity contribution (note 3(b)), Ascribed value	$ 112
Ending balance, Number of shares outstanding	159,766,930		155,925,990
Beginning balance, Number of shares	155,925,990
Ending balance, Ascribed value	$ 189,832		$ 187,886
Beginning balance, Ascribed value	$ 187,886