v3.25.3
Financial liabilities - Disclosure of remaining contractual maturities of financial liabilities (Details) - EUR (€)
€ in Thousands
Sep. 02, 2022
Sep. 30, 2025
Dec. 31, 2024
Sep. 30, 2024
Dec. 31, 2023
Disclosure of maturity analysis for derivative financial liabilities [line items]          
Royalty certificates   € 28,099 € 13,023    
Royalty certificates, undiscounted cash flows   0 0    
Lease liabilities   1,549 2,363 € 2,185 € 540
Gross lease liabilities   1,747 2,512    
Derivative instruments   0 4,786 5,819 2,579
Derivative financial liabilities, undiscounted cash flows   0 4,786    
Total financial liabilities   73,988 114,004    
Financial liabilities, undiscounted cash flows   52,916 122,680    
LESS THAN 1 YEAR          
Disclosure of maturity analysis for derivative financial liabilities [line items]          
Royalty certificates, undiscounted cash flows   0 0    
Gross lease liabilities   980 993    
Derivative financial liabilities, undiscounted cash flows   0 1,166    
Financial liabilities, undiscounted cash flows   32,481 38,468    
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   672 996    
Derivative financial liabilities, undiscounted cash flows   0 0    
Financial liabilities, undiscounted cash flows   20,341 56,698    
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   95 516    
Derivative financial liabilities, undiscounted cash flows   0 3,620    
Financial liabilities, undiscounted cash flows   95 27,507    
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 7    
Derivative financial liabilities, undiscounted cash flows   0 0    
Financial liabilities, undiscounted cash flows   0 7    
Heights convertible notes          
Disclosure of maturity analysis for derivative financial liabilities [line items]          
Convertible loans notes   0 21,574    
Convertible loans notes, undiscounted cash flows   0 24,063    
Heights convertible notes | LESS THAN 1 YEAR          
Disclosure of maturity analysis for derivative financial liabilities [line items]          
Convertible loans notes, undiscounted cash flows   0 8,750    
Heights convertible notes | FROM 1 TO 2 YEARS          
Disclosure of maturity analysis for derivative financial liabilities [line items]          
Convertible loans notes, undiscounted cash flows   0 8,750    
Heights convertible notes | FROM 2 TO 5 YEARS          
Disclosure of maturity analysis for derivative financial liabilities [line items]          
Convertible loans notes, undiscounted cash flows   0 6,563    
Heights convertible notes | LONGER THAN 5 YEARS          
Disclosure of maturity analysis for derivative financial liabilities [line items]          
Convertible loans notes, undiscounted cash flows   0 0    
Kreos & Claret convertible notes (OCABSA)          
Disclosure of maturity analysis for derivative financial liabilities [line items]          
Convertible loans notes   8,269 23,370    
Convertible loans notes, undiscounted cash flows   9,660 30,653    
Derivative instruments   0 1,166 € 2,984 € 2,579
Kreos & Claret convertible notes (OCABSA) | LESS THAN 1 YEAR          
Disclosure of maturity analysis for derivative financial liabilities [line items]          
Convertible loans notes, undiscounted cash flows   4,684 2,250    
Kreos & Claret convertible notes (OCABSA) | FROM 1 TO 2 YEARS          
Disclosure of maturity analysis for derivative financial liabilities [line items]          
Convertible loans notes, undiscounted cash flows   4,976 19,943    
Kreos & Claret convertible notes (OCABSA) | FROM 2 TO 5 YEARS          
Disclosure of maturity analysis for derivative financial liabilities [line items]          
Convertible loans notes, undiscounted cash flows   0 8,460    
Kreos & Claret convertible notes (OCABSA) | LONGER THAN 5 YEARS          
Disclosure of maturity analysis for derivative financial liabilities [line items]          
Convertible loans notes, undiscounted cash flows   0 0    
Kreos/Claret bond loans          
Disclosure of maturity analysis for derivative financial liabilities [line items]          
Convertible loans notes   34,819 46,401    
Convertible loans notes, undiscounted cash flows   40,241 58,080    
Kreos/Claret bond loans | LESS THAN 1 YEAR          
Disclosure of maturity analysis for derivative financial liabilities [line items]          
Convertible loans notes, undiscounted cash flows   25,548 24,016    
Kreos/Claret bond loans | FROM 1 TO 2 YEARS          
Disclosure of maturity analysis for derivative financial liabilities [line items]          
Convertible loans notes, undiscounted cash flows   14,693 25,715    
Kreos/Claret bond loans | FROM 2 TO 5 YEARS          
Disclosure of maturity analysis for derivative financial liabilities [line items]          
Convertible loans notes, undiscounted cash flows   0 8,348    
Kreos/Claret bond loans | LONGER THAN 5 YEARS          
Disclosure of maturity analysis for derivative financial liabilities [line items]          
Convertible loans notes, undiscounted cash flows   0 0    
PGE          
Disclosure of maturity analysis for derivative financial liabilities [line items]          
Borrowings   1,252 2,488    
Borrowings, undiscounted cash flows   1,268 2,586    
PGE | LESS THAN 1 YEAR          
Disclosure of maturity analysis for derivative financial liabilities [line items]          
Borrowings, undiscounted cash flows   1,268 1,293    
PGE | FROM 1 TO 2 YEARS          
Disclosure of maturity analysis for derivative financial liabilities [line items]          
Borrowings, undiscounted cash flows   0 1,293    
PGE | FROM 2 TO 5 YEARS          
Disclosure of maturity analysis for derivative financial liabilities [line items]          
Borrowings, undiscounted cash flows   0 0    
PGE | LONGER THAN 5 YEARS          
Disclosure of maturity analysis for derivative financial liabilities [line items]          
Borrowings, 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 € 172,000        
Royalty certificate, expiration period 15 years