v3.26.1
Fair Value of Financial Instruments - Summary of Financial Instruments Measured at Fair Value (Details) - CAD ($)
$ in Thousands
Mar. 31, 2026
Mar. 31, 2025
Disclosure Of Fair Value Measurements Of Assets And Liabilities [Line Items]    
Assets $ 601,087 $ 852,666
Liabilities 89,255 244,075
At fair value | Other long term liability    
Disclosure Of Fair Value Measurements Of Assets And Liabilities [Line Items]    
Liabilities 498 48,095
At fair value | Derivative liabilities    
Disclosure Of Fair Value Measurements Of Assets And Liabilities [Line Items]    
Liabilities 3,697 5,531
At fair value | Short-term investments    
Disclosure Of Fair Value Measurements Of Assets And Liabilities [Line Items]    
Assets 52,213  
At fair value | Preferred shares    
Disclosure Of Fair Value Measurements Of Assets And Liabilities [Line Items]    
Assets 10,560  
At fair value | Royalty receivable    
Disclosure Of Fair Value Measurements Of Assets And Liabilities [Line Items]    
Assets 1,553  
At fair value | Marketable securities    
Disclosure Of Fair Value Measurements Of Assets And Liabilities [Line Items]    
Assets   554
At fair value | Level 1 | Other long term liability    
Disclosure Of Fair Value Measurements Of Assets And Liabilities [Line Items]    
Liabilities 498 498
At fair value | Level 1 | Derivative liabilities    
Disclosure Of Fair Value Measurements Of Assets And Liabilities [Line Items]    
Liabilities 1,387 3,111
At fair value | Level 1 | Short-term investments    
Disclosure Of Fair Value Measurements Of Assets And Liabilities [Line Items]    
Assets 0  
At fair value | Level 1 | Preferred shares    
Disclosure Of Fair Value Measurements Of Assets And Liabilities [Line Items]    
Assets 0  
At fair value | Level 1 | Royalty receivable    
Disclosure Of Fair Value Measurements Of Assets And Liabilities [Line Items]    
Assets 0  
At fair value | Level 1 | Marketable securities    
Disclosure Of Fair Value Measurements Of Assets And Liabilities [Line Items]    
Assets   554
At fair value | Level 2 | Other long term liability    
Disclosure Of Fair Value Measurements Of Assets And Liabilities [Line Items]    
Liabilities 0 0
At fair value | Level 2 | Derivative liabilities    
Disclosure Of Fair Value Measurements Of Assets And Liabilities [Line Items]    
Liabilities 2,310 2,420
At fair value | Level 2 | Short-term investments    
Disclosure Of Fair Value Measurements Of Assets And Liabilities [Line Items]    
Assets 52,213  
At fair value | Level 2 | Preferred shares    
Disclosure Of Fair Value Measurements Of Assets And Liabilities [Line Items]    
Assets 0  
At fair value | Level 2 | Royalty receivable    
Disclosure Of Fair Value Measurements Of Assets And Liabilities [Line Items]    
Assets 0  
At fair value | Level 2 | Marketable securities    
Disclosure Of Fair Value Measurements Of Assets And Liabilities [Line Items]    
Assets   0
At fair value | Level 3 | Other long term liability    
Disclosure Of Fair Value Measurements Of Assets And Liabilities [Line Items]    
Liabilities 0 47,597
At fair value | Level 3 | Derivative liabilities    
Disclosure Of Fair Value Measurements Of Assets And Liabilities [Line Items]    
Liabilities 0 0
At fair value | Level 3 | Short-term investments    
Disclosure Of Fair Value Measurements Of Assets And Liabilities [Line Items]    
Assets 0  
At fair value | Level 3 | Preferred shares    
Disclosure Of Fair Value Measurements Of Assets And Liabilities [Line Items]    
Assets 10,560  
At fair value | Level 3 | Royalty receivable    
Disclosure Of Fair Value Measurements Of Assets And Liabilities [Line Items]    
Assets $ 1,553  
At fair value | Level 3 | Marketable securities    
Disclosure Of Fair Value Measurements Of Assets And Liabilities [Line Items]    
Assets   $ 0