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Equity-accounted Investments - Financial Information of Weichai Ballard (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Disclosure of joint ventures [line items]      
Current assets $ 864,741 $ 1,028,507  
Current liabilities (70,586) (73,168)  
Carrying amount of investment 13,901 24,026  
Net loss 177,716 173,494 [1]  
Corporate share of net loss $ 10,131 $ 11,617 [1]  
Weichai Ballard JV      
Disclosure of joint ventures [line items]      
Proportion of ownership interest in joint venture 49.00% 49.00%  
Net assets $ 16,607 $ 27,895  
Carrying amount of investment 13,901 24,026 $ 28,982
Corporate share of net loss 9,931 11,599  
Weichai Ballard JV | Weichai Ballard JV      
Disclosure of joint ventures [line items]      
Current assets 63,023 80,088  
Non-current assets 132 2,618  
Current liabilities (29,265) (23,460)  
Non-current liabilities 0 (2,314)  
Net assets 33,890 56,932  
Incorporation costs 324 324  
Elimination of unrealized profit on downstream sales, net of sale to third party (3,030) (4,193)  
Carrying amount of investment 13,901 24,026  
Revenue 12,705 6,476  
Net loss 20,268 23,672  
Corporate share of net loss $ 9,931 $ 11,599  
[1] Comparative information has been restated due to a discontinued operation (note 7).