v3.26.1
Income Taxes - Movements in Deferred Tax Assets (Liabilities) (Details) - CAD ($)
$ in Thousands
 12 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Reconciliation of changes in deferred tax liability (asset) [abstract]    
Deferred tax assets $ 4,219  
Deferred tax liabilities (1,897)  
Net deferred tax assets (liabilities) 2,322 $ (847)
Discontinued operations (3,479) (399)
Deferred tax assets 2,458 4,219
Deferred tax liabilities 0 (1,897)
Net deferred tax assets (liabilities) 2,458 2,322
Total deferred tax assets    
Reconciliation of changes in deferred tax liability (asset) [abstract]    
Deferred tax assets 34,572 29,989
Discontinued operations 2,021  
Recovered through (charged to) earnings (10,818) 4,222
Reclass for liability for asset held for sale (2,021)  
Recovered through (charged to) other comprehensive income 108 361
Recovered through (charged to) equity   0
Deferred tax assets 23,862 34,572
Non-capital losses    
Reconciliation of changes in deferred tax liability (asset) [abstract]    
Deferred tax assets 28,276 23,740
Discontinued operations 1,075  
Recovered through (charged to) earnings (7,310) 4,293
Reclass for liability for asset held for sale (1,075)  
Recovered through (charged to) other comprehensive income 70 243
Recovered through (charged to) equity   0
Deferred tax assets 21,036 28,276
Capital losses    
Reconciliation of changes in deferred tax liability (asset) [abstract]    
Deferred tax assets 327 56
Discontinued operations 59  
Recovered through (charged to) earnings 0 271
Reclass for liability for asset held for sale (59)  
Recovered through (charged to) other comprehensive income 0 0
Recovered through (charged to) equity   0
Deferred tax assets 327 327
Finance costs    
Reconciliation of changes in deferred tax liability (asset) [abstract]    
Deferred tax assets 564 64
Discontinued operations 18  
Recovered through (charged to) earnings (564) 500
Reclass for liability for asset held for sale (18)  
Recovered through (charged to) other comprehensive income 0 0
Recovered through (charged to) equity   0
Deferred tax assets 0 564
Investment tax credit    
Reconciliation of changes in deferred tax liability (asset) [abstract]    
Deferred tax assets 0 0
Recovered through (charged to) earnings   0
Recovered through (charged to) other comprehensive income   0
Recovered through (charged to) equity   0
Deferred tax assets   0
Derivatives    
Reconciliation of changes in deferred tax liability (asset) [abstract]    
Deferred tax assets 0 0
Recovered through (charged to) earnings   0
Recovered through (charged to) other comprehensive income   0
Recovered through (charged to) equity   0
Deferred tax assets   0
Leases    
Reconciliation of changes in deferred tax liability (asset) [abstract]    
Deferred tax assets 5,345 6,238
Discontinued operations 869  
Recovered through (charged to) earnings (2,944) (989)
Reclass for liability for asset held for sale (869)  
Recovered through (charged to) other comprehensive income 38 96
Recovered through (charged to) equity   0
Deferred tax assets 2,439 5,345
Others    
Reconciliation of changes in deferred tax liability (asset) [abstract]    
Deferred tax assets 60 (109)
Discontinued operations 0  
Recovered through (charged to) earnings 0 147
Reclass for liability for asset held for sale 0  
Recovered through (charged to) other comprehensive income 0 22
Recovered through (charged to) equity   0
Deferred tax assets 60 60
Total deferred tax liabilities    
Reconciliation of changes in deferred tax liability (asset) [abstract]    
Deferred tax liabilities (32,250) (30,836)
Discontinued operations (5,500)  
Recovered through (charged to) earnings 10,874 (1,070)
Reclass for liability for asset held for sale 5,500  
Recovered through (charged to) other comprehensive income (28) (344)
Recovered through (charged to) equity   0
Deferred tax liabilities (21,404) (32,250)
Convertible debenture    
Reconciliation of changes in deferred tax liability (asset) [abstract]    
Deferred tax liabilities 0 0
Recovered through (charged to) earnings   0
Recovered through (charged to) other comprehensive income   0
Recovered through (charged to) equity   0
Deferred tax liabilities   0
Investment in associates    
Reconciliation of changes in deferred tax liability (asset) [abstract]    
Deferred tax liabilities 0 0
Recovered through (charged to) earnings   0
Recovered through (charged to) other comprehensive income   0
Recovered through (charged to) equity   0
Deferred tax liabilities   0
Intangible assets    
Reconciliation of changes in deferred tax liability (asset) [abstract]    
Deferred tax liabilities (8,641) (7,742)
Discontinued operations (59)  
Recovered through (charged to) earnings 1,383 (497)
Reclass for liability for asset held for sale 59  
Recovered through (charged to) other comprehensive income (157) (402)
Recovered through (charged to) equity   0
Deferred tax liabilities (7,415) (8,641)
Property, plant and equipment    
Reconciliation of changes in deferred tax liability (asset) [abstract]    
Deferred tax liabilities (18,534) (12,380)
Discontinued operations (5,509)  
Recovered through (charged to) earnings 11,061 (6,206)
Reclass for liability for asset held for sale 5,509  
Recovered through (charged to) other comprehensive income 50 52
Recovered through (charged to) equity   0
Deferred tax liabilities (7,423) (18,534)
Inventory    
Reconciliation of changes in deferred tax liability (asset) [abstract]    
Deferred tax liabilities (5,138) (5,709)
Discontinued operations 0  
Recovered through (charged to) earnings (4,244) 603
Reclass for liability for asset held for sale 0  
Recovered through (charged to) other comprehensive income 178 (32)
Recovered through (charged to) equity   0
Deferred tax liabilities (9,204) (5,138)
Biological assets    
Reconciliation of changes in deferred tax liability (asset) [abstract]    
Deferred tax liabilities 777 (4,863)
Discontinued operations 0  
Recovered through (charged to) earnings 2,485 5,640
Reclass for liability for asset held for sale 0  
Recovered through (charged to) other comprehensive income 0 0
Recovered through (charged to) equity   0
Deferred tax liabilities 3,262 777
Others    
Reconciliation of changes in deferred tax liability (asset) [abstract]    
Deferred tax liabilities (714) (142)
Discontinued operations 68  
Recovered through (charged to) earnings 189 (610)
Reclass for liability for asset held for sale (68)  
Recovered through (charged to) other comprehensive income (99) 38
Recovered through (charged to) equity   0
Deferred tax liabilities (624) (714)
Net deferred tax assets (liabilities)    
Reconciliation of changes in deferred tax liability (asset) [abstract]    
Discontinued operations (3,479)  
Recovered through (charged to) earnings 56 3,152
Reclass for liability for asset held for sale 3,479  
Recovered through (charged to) other comprehensive income $ 80 17
Recovered through (charged to) equity   $ 0