Share Capital - Summary of Issuances of Stock Other (Details) - CAD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2026	Mar. 31, 2025	Mar. 31, 2024
Settlement of Convertible Debentures [Member]
Equity Class Of Treasury Stock [Line Items]
Number of common shares			8,445,894
Share capital			$ 108,055
Settlement of 4.25% Unsecured Senior Notes [Member]
Equity Class Of Treasury Stock [Line Items]
Number of common shares			11,477,366
Share capital			$ 57,084
Settlement of Debentures [Member]
Equity Class Of Treasury Stock [Line Items]
Number of common shares			7,341,818
Share capital			$ 87,754
Settlement of Acreage Acquisition [Member]
Equity Class Of Treasury Stock [Line Items]
Number of common shares		12,559,952
Share capital		$ 63,919
Share and warrant reserve		11,939
Other Issuances and Share Issue Costs [Member]
Equity Class Of Treasury Stock [Line Items]
Number of common shares	30,375		6,165
Share capital	$ (6,750)	$ (10,245)	$ (317)
Share and warrant reserve			$ (80)
Total [Member]
Equity Class Of Treasury Stock [Line Items]
Number of common shares	30,375	12,559,952	27,271,243
Share capital	$ (6,750)	$ 53,674	$ 252,576
Share and warrant reserve		$ 11,939	$ (80)