v3.26.1
Assets Held for Sale and Discontinued Operations - Assets Held For Sale (Details) - CAD ($)
$ in Thousands
 12 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Disclosure Of Non-current Assets Held For Sale [Line Items]    
Beginning balance $ 222 $ 1,399
Transfer from property, plant, and equipment 1,919  
Additions 178,103 14,089
Impairment (25,068) (11,643)
Foreign exchange 61 57
Liabilities held for sale (110,089) (1,281)
Proceeds from disposal (15,946) (2,399)
Non-controlling interest (27,216)  
Ending balance 1,986 222
Disposal groups classified as held for sale    
Disclosure Of Non-current Assets Held For Sale [Line Items]    
Beginning balance 0 0
Additions 178,103  
Impairment (25,068)  
Liabilities held for sale (110,089)  
Proceeds from disposal (15,730)  
Non-controlling interest (27,216)  
Ending balance 0 0
Non-current assets held for sale | Equipment    
Disclosure Of Non-current Assets Held For Sale [Line Items]    
Beginning balance 0 1,200
Transfer from property, plant, and equipment 371  
Proceeds from disposal   (1,200)
Ending balance 371 0
Non-current assets held for sale | Land    
Disclosure Of Non-current Assets Held For Sale [Line Items]    
Beginning balance 0 0
Transfer from property, plant, and equipment 1,548  
Foreign exchange 67  
Ending balance 1,615 0
Non-current assets held for sale | ICC Labs Inc. assets    
Disclosure Of Non-current Assets Held For Sale [Line Items]    
Beginning balance 222 199
Additions   14,089
Impairment   (11,643)
Foreign exchange (6) 57
Liabilities held for sale   (1,281)
Proceeds from disposal (216) (1,199)
Ending balance $ 0 $ 222