v3.26.1
Financial liabilities - Disclosure of remaining contractual maturities of financial liabilities (Details) - EUR (€)
€ in Thousands
Sep. 02, 2022
Mar. 31, 2026
Dec. 31, 2025
Mar. 31, 2025
Dec. 31, 2024
Disclosure of maturity analysis for derivative financial liabilities [line items]          
Royalty certificates   € 32,764 € 30,237    
Royalty certificates, undiscounted cash flows   0 0    
Lease liabilities   1,447 1,856 € 2,122 € 2,363
Gross lease liabilities   1,482 1,906    
Total financial liabilities   34,210 32,093    
Financial liabilities, undiscounted cash flows   1,482 1,906    
LESS THAN 1 YEAR          
Disclosure of maturity analysis for derivative financial liabilities [line items]          
Royalty certificates, undiscounted cash flows   0 0    
Gross lease liabilities   1,127 1,340    
Financial liabilities, undiscounted cash flows   1,127 1,340    
FROM 1 TO 2 YEARS          
Disclosure of maturity analysis for derivative financial liabilities [line items]          
Royalty certificates, undiscounted cash flows   0 0    
Gross lease liabilities   250 450    
Financial liabilities, undiscounted cash flows   250 450    
FROM 2 TO 5 YEARS          
Disclosure of maturity analysis for derivative financial liabilities [line items]          
Royalty certificates, undiscounted cash flows   0 0    
Gross lease liabilities   104 116    
Financial liabilities, undiscounted cash flows   104 116    
LONGER THAN 5 YEARS          
Disclosure of maturity analysis for derivative financial liabilities [line items]          
Royalty certificates, undiscounted cash flows   0 0    
Gross lease liabilities   0 0    
Financial liabilities, undiscounted cash flows   € 0 € 0    
Royalty certificates          
Disclosure of maturity analysis for derivative financial liabilities [line items]          
Royalty certificate, percentage of future sales 2.00%        
Royalty certificate, maximum amount € 172,100