v3.26.1
Property, Plant and Equipment - Changes in the Net Book Values of Property, Plant and Equipment (Details) - CAD ($)
$ in Thousands
12 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Reconciliation of changes in property, plant and equipment [abstract]    
Beginning balance $ 268,107 $ 294,324
Additions 18,938 23,279
Disposals (134,244) (898)
Other (1,296) (20,713)
Depreciation (24,760) (27,445)
Impairment (2,775) (696)
Foreign currency translation (282) 256
Ending balance 123,688 268,107
Owned assets    
Reconciliation of changes in property, plant and equipment [abstract]    
Beginning balance 240,814 263,590
Additions 18,211 15,670
Disposals (123,256) (336)
Other (764) (13,817)
Depreciation (21,480) (24,149)
Impairment (2,775) (129)
Foreign currency translation (456) (15)
Ending balance 110,294 240,814
Owned assets | Land    
Reconciliation of changes in property, plant and equipment [abstract]    
Beginning balance 43,937 43,914
Additions 0 0
Disposals (30,362) 0
Other (1,548) 0
Depreciation 0 0
Impairment 0 0
Foreign currency translation 25 23
Ending balance 12,052 43,937
Owned assets | Buildings    
Reconciliation of changes in property, plant and equipment [abstract]    
Beginning balance 131,343 143,867
Additions 993 1,093
Disposals (62,527) 0
Other 3,973 (789)
Depreciation (11,455) (12,622)
Impairment (1,065) 0
Foreign currency translation (22) (206)
Ending balance 61,240 131,343
Owned assets | Construction in progress    
Reconciliation of changes in property, plant and equipment [abstract]    
Beginning balance 27,153 25,685
Additions 14,490 12,929
Disposals (12,783) 0
Other (10,675) (11,489)
Depreciation (228) 0
Impairment (970) 0
Foreign currency translation (37) 28
Ending balance 16,950 27,153
Owned assets | Computer software & equipment    
Reconciliation of changes in property, plant and equipment [abstract]    
Beginning balance 1,196 1,198
Additions 1,068 619
Disposals 0 0
Other (569) (28)
Depreciation (701) (593)
Impairment 0 0
Foreign currency translation 6 0
Ending balance 1,000 1,196
Owned assets | Furniture & fixtures    
Reconciliation of changes in property, plant and equipment [abstract]    
Beginning balance 995 1,456
Additions 96 69
Disposals (33) (13)
Other 461 (105)
Depreciation (265) (439)
Impairment 0 0
Foreign currency translation 15 27
Ending balance 1,269 995
Owned assets | Production & other equipment    
Reconciliation of changes in property, plant and equipment [abstract]    
Beginning balance 36,190 47,470
Additions 1,564 960
Disposals (17,551) (323)
Other 7,594 (1,406)
Depreciation (8,831) (10,495)
Impairment (740) (129)
Foreign currency translation (443) 113
Ending balance 17,783 36,190
Right-of-use leased assets    
Reconciliation of changes in property, plant and equipment [abstract]    
Beginning balance 27,293 30,734
Additions 727 7,609
Disposals (10,988) (562)
Other (532) (6,896)
Depreciation (3,280) (3,296)
Impairment 0 (567)
Foreign currency translation 174 271
Ending balance 13,394 27,293
Right-of-use leased assets | Land    
Reconciliation of changes in property, plant and equipment [abstract]    
Beginning balance 11,629 12,289
Additions 0 0
Disposals (10,988) 0
Other (461) (396)
Depreciation (180) (264)
Impairment 0 0
Foreign currency translation 0 0
Ending balance 0 11,629
Right-of-use leased assets | Buildings    
Reconciliation of changes in property, plant and equipment [abstract]    
Beginning balance 15,388 18,100
Additions 581 7,406
Disposals 0 (562)
Other (65) (6,475)
Depreciation (2,880) (2,773)
Impairment 0 (567)
Foreign currency translation 168 259
Ending balance 13,192 15,388
Right-of-use leased assets | Production & other equipment    
Reconciliation of changes in property, plant and equipment [abstract]    
Beginning balance 276 345
Additions 146 203
Disposals 0 0
Other (6) (25)
Depreciation (220) (259)
Impairment 0 0
Foreign currency translation 6 12
Ending balance $ 202 $ 276