v3.26.1
Financial liabilities - Royalty certificates (Details)
€ in Thousands, $ in Millions
Mar. 31, 2026
EUR (€)
Dec. 31, 2025
EUR (€)
May 07, 2026
EUR (€)
May 04, 2026
USD ($)
May 04, 2026
EUR (€)
Mar. 31, 2025
EUR (€)
Disclosure of detailed information about borrowings [line items]            
Financial liabilities, at fair value € 134,993 € 141,409        
Repurchase of royalty certificates agreement            
Disclosure of detailed information about borrowings [line items]            
Purchase price of royalty certificates     € 76,466 $ 90 € 76,500  
Royalty certificates            
Disclosure of detailed information about borrowings [line items]            
Financial liabilities, at fair value € 104,032         € 102,001
Discount rate 7.50%          
Royalty certificates | POS            
Disclosure of detailed information about borrowings [line items]            
Percentage of reasonably possible increase in unobservable input, liabilities 0.05%          
Increase (decrease) in carrying value due to reasonably possible increase in unobservable input liabilities € 1,853          
Percentage of reasonably possible decrease in unobservable input, liabilities (5.00%)          
Increase (decrease) in carrying value resulting from a reasonably possible decrease in unobservable input liabilities € (1,853)          
Royalty certificates | POS | At fair value            
Disclosure of detailed information about borrowings [line items]            
Percentage of reasonably possible increase in unobservable input, liabilities 0.05% 0.05%        
Percentage of reasonably possible decrease in unobservable input, liabilities (0.05%) (0.05%)        
Increase (decrease) in financial liabilities at fair value due to reasonably possible increase in unobservable input € 5,920 € 5,810        
Increase (decrease) in financial liabilities at fair value due to reasonably possible decrease in unobservable input € (5,920) € (5,810)        
Royalty certificates | Peak penetration            
Disclosure of detailed information about borrowings [line items]            
Percentage of reasonably possible increase in unobservable input, liabilities 5.00%          
Increase (decrease) in carrying value due to reasonably possible increase in unobservable input liabilities € 2,882          
Percentage of reasonably possible decrease in unobservable input, liabilities (5.00%)          
Increase (decrease) in carrying value resulting from a reasonably possible decrease in unobservable input liabilities € (4,416)          
Royalty certificates | Peak penetration | At fair value            
Disclosure of detailed information about borrowings [line items]            
Percentage of reasonably possible increase in unobservable input, liabilities 5.00% 5.00%        
Percentage of reasonably possible decrease in unobservable input, liabilities (5.00%) (5.00%)        
Increase (decrease) in financial liabilities at fair value due to reasonably possible increase in unobservable input € 2,952 € 2,830        
Increase (decrease) in financial liabilities at fair value due to reasonably possible decrease in unobservable input € (5,557) € (5,590)        
Royalty certificates | Weighted average cost of capital, measurement input | At fair value            
Disclosure of detailed information about borrowings [line items]            
Percentage of reasonably possible increase in unobservable input, liabilities   1.00%        
Percentage of reasonably possible decrease in unobservable input, liabilities   (1.00%)        
Increase (decrease) in financial liabilities at fair value due to reasonably possible increase in unobservable input   € (4,940)        
Increase (decrease) in financial liabilities at fair value due to reasonably possible decrease in unobservable input   € 5,251        
Royalty certificates | Discount rate, measurement input | At fair value            
Disclosure of detailed information about borrowings [line items]            
Percentage of reasonably possible increase in unobservable input, liabilities 1.00%          
Percentage of reasonably possible decrease in unobservable input, liabilities (1.00%)          
Increase (decrease) in financial liabilities at fair value due to reasonably possible increase in unobservable input € (4,786)          
Increase (decrease) in financial liabilities at fair value due to reasonably possible decrease in unobservable input € 5,078