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Equity-accounted Investments - Financial Information of Weichai Ballard (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Disclosure of joint ventures [line items]      
Current assets $ 698,878 $ 864,741  
Current liabilities (75,586) (70,586)  
Carrying amount of investment 8,238 13,901  
Net loss 324,245 177,716  
Corporate share of net loss $ 4,941 $ 10,131  
Weichai Ballard JV      
Disclosure of joint ventures [line items]      
Proportion of ownership interest in joint venture 49.00% 49.00%  
Net assets $ 11,096 $ 16,607  
Carrying amount of investment 8,238 13,901 $ 24,026
Corporate share of net loss 4,941 9,931  
Weichai Ballard JV | Weichai Ballard JV      
Disclosure of joint ventures [line items]      
Current assets 40,993 63,023  
Non-current assets 50 132  
Current liabilities (18,398) (29,265)  
Net assets 22,645 33,890  
Incorporation costs 324 324  
Elimination of unrealized profit on downstream sales, net of sale to third party (3,182) (3,030)  
Carrying amount of investment 8,238 13,901  
Revenue 2,290 12,705  
Net loss 10,084 20,268  
Corporate share of net loss $ 4,941 $ 9,931