v3.25.3
Share-based payments - Narrative (Details)
€ in Thousands
1 Months Ended 7 Months Ended 9 Months Ended
Sep. 30, 2025
EUR (€)
shares
Aug. 01, 2025
shares
May 30, 2025
shares
Mar. 20, 2025
shares
Feb. 06, 2025
shares
Apr. 30, 2025
shares
Mar. 31, 2025
shares
Jan. 31, 2025
shares
Aug. 31, 2025
shares
Sep. 30, 2025
EUR (€)
shares
Dec. 31, 2024
EUR (€)
Disclosure of terms and conditions of share-based payment arrangement [line items]                      
Current provisions | € € 11,412                 € 11,412 € 532
Non-current provisions | € € 16,622                 € 16,622 € 819
BSAs                      
Disclosure of terms and conditions of share-based payment arrangement [line items]                      
Number of instruments issued (in shares) 486,714         39,370   125,000   164,370  
BSAs | Board Member                      
Disclosure of terms and conditions of share-based payment arrangement [line items]                      
Number of instruments issued (in shares)           39,370          
Vesting period           4 years   4 years      
Vesting percentage           25.00%   25.00%      
AGA-2025-1                      
Disclosure of terms and conditions of share-based payment arrangement [line items]                      
Number of instruments issued (in shares)         4,319,500       4,319,500 4,319,500  
AGA-2025-2                      
Disclosure of terms and conditions of share-based payment arrangement [line items]                      
Number of instruments issued (in shares)         123,102       123,102 123,102  
Vesting period                 2 years    
AGA-2025-3                      
Disclosure of terms and conditions of share-based payment arrangement [line items]                      
Number of instruments issued (in shares)         17,625       17,625 17,625  
AGA-2025-4                      
Disclosure of terms and conditions of share-based payment arrangement [line items]                      
Number of instruments issued (in shares)         30,500       30,500 30,500  
AGA-2025-6                      
Disclosure of terms and conditions of share-based payment arrangement [line items]                      
Number of instruments issued (in shares)     25,000           25,000 25,000  
AGA-2025-7                      
Disclosure of terms and conditions of share-based payment arrangement [line items]                      
Number of instruments issued (in shares)   1,711,000             1,711,000 1,711,000  
AGA-2025-5                      
Disclosure of terms and conditions of share-based payment arrangement [line items]                      
Number of instruments issued (in shares)       50,000     50,000   50,000 50,000  
Tranche 1 | AGA-2025-1, AGA-2025-2, AGA-2025-3, AGA-2025-4, AGA-2025-6 and AGA-2025-7                      
Disclosure of terms and conditions of share-based payment arrangement [line items]                      
Vesting period                 2 years    
Vesting percentage                 50.00%    
Tranche 2 | AGA-2025-1, AGA-2025-2, AGA-2025-3, AGA-2025-4, AGA-2025-6 and AGA-2025-7                      
Disclosure of terms and conditions of share-based payment arrangement [line items]                      
Vesting period                 3 years    
Vesting percentage                 25.00%    
Tranche 3 | AGA-2025-1, AGA-2025-2, AGA-2025-3, AGA-2025-4, AGA-2025-6 and AGA-2025-7                      
Disclosure of terms and conditions of share-based payment arrangement [line items]                      
Vesting period                 4 years    
Vesting percentage                 25.00%