v3.26.1
Related party disclosures - Directors’ Interests In An Employee Share Incentive Plan (Details)
12 Months Ended
Jun. 30, 2025
shares
Jun. 28, 2024
$ / shares
Jun. 27, 2023
shares
$ / shares
Dec. 31, 2025
USD ($)
$ / shares
Dec. 31, 2024
USD ($)
$ / shares
Dec. 31, 2023
USD ($)
$ / shares
Dec. 31, 2025
€ / shares
Dec. 31, 2024
€ / shares
Disclosure of transactions between related parties [line items]                
Key management personnel compensation       $ 8,422,000 $ 8,082,000 $ 7,032,000    
Subscription price (eur per share) | $ / shares       $ 0.77 $ 1.17 $ 1.44    
Share-based payment expense       $ 2,161,000 $ 2,763,000 $ 4,144,000    
Key management personnel                
Disclosure of transactions between related parties [line items]                
Termination indemnity amount (in months)       18 months        
Percentage of bonus in event of dismissal       150.00%     150.00%  
Key management personnel compensation       $ 12,000        
Warrants | Board Of Directors [Member]                
Disclosure of transactions between related parties [line items]                
Number of warrants authorized (in shares) | shares 360,000   180,000          
Exercise price (usd per share) | $ / shares   $ 0.13 $ 0.54          
Subscription price (eur per share) | € / shares             € 0.00001 € 0.00001
Share-based payment expense       $ 135,000 $ 238,000 $ 292,000