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Financial instruments - Narrative (Details)
 12 Months Ended
Dec. 31, 2023
USD ($)
Dec. 31, 2022
USD ($)
Dec. 31, 2023
CAD ($)
Dec. 31, 2023
Dec. 31, 2023
$ / $
Dec. 31, 2023
$ / shares
Disclosure of nature and extent of risks arising from financial instruments [line items]            
Recovery of contributions to long-term investments $ 1,000,000 $ 0        
Gains (losses) on financial assets at fair value through profit or loss $ 12,897,000 16,877,000        
Currency risk            
Disclosure of nature and extent of risks arising from financial instruments [line items]            
Exposure to risk holding Canadian denominated cash and cash equivalents, percentage (up to) 100.00%          
Exposure to risk holding Canadian dollar net expenditures, percentage (up to) 50.00%          
Average price of hedging instrument (CDN per USD)     1.35   1.35 1.00
Reasonably possible change in risk variable, percent       10.00%    
Increase in the corresponding risk variable on income $ 7,236,000          
Currency risk | Cash and cash equivalents            
Disclosure of nature and extent of risks arising from financial instruments [line items]            
Risk exposure associated with instruments sharing characteristic     $ 64,383,000      
Currency risk | Foreign exchange contracts            
Disclosure of nature and extent of risks arising from financial instruments [line items]            
Risk exposure associated with instruments sharing characteristic     $ 31,500,000      
Interest rate risk            
Disclosure of nature and extent of risks arising from financial instruments [line items]            
Reasonably possible change in risk variable, percent       1.00%    
Decrease in the corresponding risk variable on investment income 7,511,000          
Forsee Power            
Disclosure of nature and extent of risks arising from financial instruments [line items]            
Gains (losses) on financial assets at fair value through profit or loss 12,897,000 16,877,000        
Green Hydrogen            
Disclosure of nature and extent of risks arising from financial instruments [line items]            
Gains (losses) on financial assets at fair value through profit or loss $ 0 (15,000)        
Green Hydrogen | Intellectual property acquired from Ballard Motive Solutions            
Disclosure of nature and extent of risks arising from financial instruments [line items]            
Recovery of contributions to long-term investments   $ 1,010,000