v3.25.2
Financial liabilities - Disclosure of remaining contractual maturities of financial liabilities (Details) - EUR (€)
€ in Thousands
Sep. 02, 2022
Jun. 30, 2025
Dec. 31, 2024
Jun. 30, 2024
Dec. 31, 2023
Disclosure of maturity analysis for derivative financial liabilities [line items]          
Royalty certificates   € 14,135 € 13,023    
Royalty certificates, undiscounted cash flows   0 0    
Lease liabilities   1,876 2,363 € 2,223 € 540
Gross lease liabilities   1,991 2,512    
Derivative instruments   5,196 4,786 6,257 2,579
Derivative financial liabilities, undiscounted cash flows   5,196 4,786    
Total financial liabilities   103,905 114,004    
Financial liabilities, undiscounted cash flows   108,481 122,680    
LESS THAN 1 YEAR          
Disclosure of maturity analysis for derivative financial liabilities [line items]          
Royalty certificates, undiscounted cash flows   0 0    
Gross lease liabilities   979 993    
Derivative financial liabilities, undiscounted cash flows   1,557 1,166    
Financial liabilities, undiscounted cash flows   38,814 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   907 996    
Derivative financial liabilities, undiscounted cash flows   3,639 0    
Financial liabilities, undiscounted cash flows   47,359 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   105 516    
Derivative financial liabilities, undiscounted cash flows   3,620    
Financial liabilities, undiscounted cash flows   22,308 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   17,743 21,574    
Convertible loans notes, undiscounted cash flows   24,828 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   1,313 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   1,313 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   22,203 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   24,293 23,370    
Convertible loans notes, undiscounted cash flows   29,528 30,653    
Derivative instruments   1,557 1,166 € 4,121 € 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   8,148 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   21,380 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   39,423 46,401    
Convertible loans notes, undiscounted cash flows   45,670 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   25,549 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   20,121 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   1,238 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