v3.25.2
Financial liabilities - Disclosure of the main data and assumptions, Kreos / Claret BSA (Details)
€ in Thousands
 6 Months Ended
Jun. 30, 2025
EUR (€)
€ / shares
scenario
shares
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 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 6.64 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 0.95
Kreos A & B BSA | Option pricing model | Volatility, expiry    
Disclosure Of Warrants Arrangements [Line Items]    
Significant unobservable input, liabilities 0.608 0.443
Kreos A & B BSA | Option pricing model | Volatility, tender offer    
Disclosure Of Warrants Arrangements [Line Items]    
Significant unobservable input, liabilities 0.608 0.443
Kreos A & B BSA | Option pricing model | Dividend    
Disclosure Of Warrants Arrangements [Line Items]    
Significant unobservable input, liabilities 0 0
Kreos A & B BSA | Option pricing model | Risk-free rate, expiry    
Disclosure Of Warrants Arrangements [Line Items]    
Significant unobservable input, liabilities 0.019 0.029
Kreos A & B BSA | Option pricing model | Risk-free, tender offer    
Disclosure Of Warrants Arrangements [Line Items]    
Significant unobservable input, liabilities 0.019 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 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 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 6.64 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 0.95
Kreos C BSA | Option pricing model | Volatility, expiry    
Disclosure Of Warrants Arrangements [Line Items]    
Significant unobservable input, liabilities 0.608 0.443
Kreos C BSA | Option pricing model | Volatility, tender offer    
Disclosure Of Warrants Arrangements [Line Items]    
Significant unobservable input, liabilities 0.608 0.443
Kreos C BSA | Option pricing model | Dividend    
Disclosure Of Warrants Arrangements [Line Items]    
Significant unobservable input, liabilities 0 0
Kreos C BSA | Option pricing model | Risk-free rate, expiry    
Disclosure Of Warrants Arrangements [Line Items]    
Significant unobservable input, liabilities 0.019 0.029
Kreos C BSA | Option pricing model | Risk-free, tender offer    
Disclosure Of Warrants Arrangements [Line Items]    
Significant unobservable input, liabilities 0.019 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 214,198 214,198
Fair value of other equity instruments | € € 390 € 243
Kreos C BSA    
Disclosure Of Warrants Arrangements [Line Items]    
Number of outstanding warrants (in shares) | shares 405,832 405,832
Fair value of other equity instruments | € € 1,167 € 923