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Financial liabilities - Disclosure of the main data and assumptions, Kreos / Claret BSA (Details) € in Thousands |  |  | 12 Months Ended |  |
--- | --- | --- | --- | --- | ---
Nov. 02, 2023 EUR (€) € / shares shares | Aug. 20, 2023 | Dec. 31, 2024 EUR (€) € / shares scenario shares | Dec. 31, 2023 EUR (€) € / shares shares | Aug. 22, 2023 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 | 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 | 9.82 | 17.10
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 | 0.50
Kreos A & B BSA | Option pricing model | Volatility, expiry |  |  |  |  |
Disclosure Of Warrants Arrangements [Line Items] |  |  |  |  |
Significant unobservable input, liabilities |  |  | 0.443 | 0.595 | 0.719
Kreos A & B BSA | Option pricing model | Volatility, tender offer |  |  |  |  |
Disclosure Of Warrants Arrangements [Line Items] |  |  |  |  |
Significant unobservable input, liabilities |  |  | 0.443 | 0.649 | 0.652
Kreos A & B BSA | Option pricing model | Dividend |  |  |  |  |
Disclosure Of Warrants Arrangements [Line Items] |  |  |  |  |
Significant unobservable input, liabilities |  |  | 0 | 0 | 0
Kreos A & B BSA | Option pricing model | Risk-free rate |  |  |  |  |
Disclosure Of Warrants Arrangements [Line Items] |  |  |  |  |
Significant unobservable input, liabilities |  |  |  | 0.0230 | 0.0300
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 rate, tender offer |  |  |  |  |
Disclosure Of Warrants Arrangements [Line Items] |  |  |  |  |
Significant unobservable input, liabilities |  |  | 0.029 |  |
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 | 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 | 8.89 |  | 6.67 | 9.82 |
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 | 0.95 |
Kreos C BSA | Option pricing model | Probability of Drawdown of Tranche C credit facility |  |  |  |  |
Disclosure Of Warrants Arrangements [Line Items] |  |  |  |  |
Significant unobservable input, liabilities | 0.30 |  |  | 0.30 |
Kreos C BSA | Option pricing model | Volatility, expiry |  |  |  |  |
Disclosure Of Warrants Arrangements [Line Items] |  |  |  |  |
Significant unobservable input, liabilities | 0.673 |  | 0.443 | 0.674 |
Kreos C BSA | Option pricing model | Volatility, tender offer |  |  |  |  |
Disclosure Of Warrants Arrangements [Line Items] |  |  |  |  |
Significant unobservable input, liabilities | 0.643 |  | 0.443 | 0.649 |
Kreos C BSA | Option pricing model | Dividend |  |  |  |  |
Disclosure Of Warrants Arrangements [Line Items] |  |  |  |  |
Significant unobservable input, liabilities | 0 |  | 0 | 0 |
Kreos C BSA | Option pricing model | Risk-free rate |  |  |  |  |
Disclosure Of Warrants Arrangements [Line Items] |  |  |  |  |
Significant unobservable input, liabilities | 0.0300 |  |  | 0.0230 |
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 rate, tender offer |  |  |  |  |
Disclosure Of Warrants Arrangements [Line Items] |  |  |  |  |
Significant unobservable input, liabilities |  |  | 0.029 |  |
Kreos A & B BSA |  |  |  |  |
Disclosure Of Warrants Arrangements [Line Items] |  |  |  |  |
Number of probability-weighted scenarios | scenario |  |  | 2 |  |
Expiry scenario period, other equity instruments granted |  | 7 years | 7 years |  |
Number of outstanding warrants (in shares) | shares |  |  | 214,198 | 214,198 | 214,198
Fair value of other equity instruments | € |  |  | € 243 | € 920 | € 2,092
Kreos C BSA |  |  |  |  |
Disclosure Of Warrants Arrangements [Line Items] |  |  |  |  |
Expiry scenario period, other equity instruments granted | 7 years |  |  |  |
Number of outstanding warrants (in shares) | shares | 405,832 |  | 405,832 | 405,832 |
Number of outstanding warrants subject to non-market performance condition (in shares) | shares | 202,915 |  | 0 | 202,916 |
Fair value of other equity instruments | € | € 1,493 |  | € 923 | € 1,659 |

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