v3.26.1
Property, Plant and Equipment - Additional Information (Details) - CAD ($)
$ in Thousands
 12 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Mar. 31, 2024
Property Plant And Equipment [Line Items]      
Depreciation of property, plant and equipment $ 19,026 $ 21,522 $ 28,376
Property, Plant and Equipment      
Property Plant And Equipment [Line Items]      
Impairment charges gain (loss) 1,715 (13,523) 40,578
Costs Recorded in Cost of Goods Sold      
Property Plant And Equipment [Line Items]      
Depreciation of property, plant and equipment 16,609 18,895 24,655
Impairment charges gain (loss) 9,878 1,991 (986)
Selling, General and Administrative Expenses      
Property Plant And Equipment [Line Items]      
Depreciation of property, plant and equipment $ 2,417 $ 2,627 $ 3,721