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Discontinued operations - Narrative (Details)
$ in Thousands
 12 Months Ended 26 Months Ended
Nov. 11, 2021
USD ($)
shares
Dec. 31, 2023
USD ($)
shares
Dec. 31, 2022
USD ($)
shares
Dec. 31, 2023
USD ($)
shares
Nov. 30, 2021
shares
Disclosure of detailed information about business combination [line items]          
Total purchase consideration   $ 3,068 $ 1,782 $ 3,068  
Shares issued (in shares) | shares   224,902 112,451 224,902  
Acquisition related costs   $ 773 $ 2,857    
Recovery on settlement of contingent consideration   0 9,891    
Amortization expense   1,696 3,107    
Impairment charges on intangible assets   2,266 13,017    
Impairment charges on goodwill   23,991 0    
Accumulated amortization          
Disclosure of detailed information about business combination [line items]          
Amortization expense   (1,696) (3,107)    
Impairment charges on intangible assets   2,266 13,017    
Arcola Energy Limited          
Disclosure of detailed information about business combination [line items]          
Interests acquired 100.00%        
Cash consideration $ 7,157        
Shares issued (in shares) | shares 337,353        
Equity total value $ 26,258 4,851   $ 4,851  
Vesting period 2 years        
Performance milestones, term       3 years  
Recovery on settlement of contingent consideration     9,891    
Amortization expense     13,017    
Intangible assets and goodwill   $ 0   $ 0  
Arcola Energy Limited | Top of range          
Disclosure of detailed information about business combination [line items]          
Total purchase consideration $ 40,000        
Ballard Motive Solutions          
Disclosure of detailed information about business combination [line items]          
Shares issued (in shares) | shares         337,353
Acquisition related costs     4,835    
intangible assets fair value     $ 2,500