v3.25.3
Financial liabilities - Disclosure of the main data and assumptions, Kreos / Claret BSA (Details)
€ in Thousands
 9 Months Ended
Sep. 30, 2025
scenario
Dec. 31, 2024
EUR (€)
€ / shares
shares
Kreos A & B BSA | Option pricing model | Exercise price per share (in euro per share)    
Disclosure Of Warrants Arrangements [Line Items]    
Significant unobservable input, liabilities   18.67
Kreos A & B BSA | Option pricing model | Ordinary share price (in euro per share)    
Disclosure Of Warrants Arrangements [Line Items]    
Significant unobservable input, liabilities   6.76
Kreos A & B BSA | Option pricing model | 7-year expiry scenario probability    
Disclosure Of Warrants Arrangements [Line Items]    
Significant unobservable input, liabilities   0.95
Kreos A & B BSA | Option pricing model | Volatility, expiry    
Disclosure Of Warrants Arrangements [Line Items]    
Significant unobservable input, liabilities   0.443
Kreos A & B BSA | Option pricing model | Volatility, tender offer    
Disclosure Of Warrants Arrangements [Line Items]    
Significant unobservable input, liabilities   0.443
Kreos A & B BSA | Option pricing model | Dividend    
Disclosure Of Warrants Arrangements [Line Items]    
Significant unobservable input, liabilities   0
Kreos A & B BSA | Option pricing model | Risk-free rate, expiry    
Disclosure Of Warrants Arrangements [Line Items]    
Significant unobservable input, liabilities   0.029
Kreos A & B BSA | Option pricing model | Risk-free, tender offer    
Disclosure Of Warrants Arrangements [Line Items]    
Significant unobservable input, liabilities   0.029
Kreos C BSA    
Disclosure Of Warrants Arrangements [Line Items]    
Number of outstanding warrants subject to non-market performance condition (in shares) | shares   0
Kreos C BSA | Option pricing model | Exercise price per share (in euro per share)    
Disclosure Of Warrants Arrangements [Line Items]    
Significant unobservable input, liabilities   9.86
Kreos C BSA | Option pricing model | Ordinary share price (in euro per share)    
Disclosure Of Warrants Arrangements [Line Items]    
Significant unobservable input, liabilities   6.67
Kreos C BSA | Option pricing model | 7-year expiry scenario probability    
Disclosure Of Warrants Arrangements [Line Items]    
Significant unobservable input, liabilities   0.95
Kreos C BSA | Option pricing model | Volatility, expiry    
Disclosure Of Warrants Arrangements [Line Items]    
Significant unobservable input, liabilities   0.443
Kreos C BSA | Option pricing model | Volatility, tender offer    
Disclosure Of Warrants Arrangements [Line Items]    
Significant unobservable input, liabilities   0.443
Kreos C BSA | Option pricing model | Dividend    
Disclosure Of Warrants Arrangements [Line Items]    
Significant unobservable input, liabilities   0
Kreos C BSA | Option pricing model | Risk-free rate, expiry    
Disclosure Of Warrants Arrangements [Line Items]    
Significant unobservable input, liabilities   0.029
Kreos C BSA | Option pricing model | Risk-free, tender offer    
Disclosure Of Warrants Arrangements [Line Items]    
Significant unobservable input, liabilities   0.029
Kreos A & B & C BSA    
Disclosure Of Warrants Arrangements [Line Items]    
Number of probability-weighted scenarios | scenario 2  
Expiry scenario period, other equity instruments granted 7 years  
Kreos A & B BSA    
Disclosure Of Warrants Arrangements [Line Items]    
Number of outstanding warrants (in shares) | shares   214,198
Fair value of other equity instruments | €   € 243
Kreos C BSA    
Disclosure Of Warrants Arrangements [Line Items]    
Number of outstanding warrants (in shares) | shares   405,832
Fair value of other equity instruments | €   € 923