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Financial liabilities - Disclosure of the main data and assumptions, Kreos BSA (Details) € in Thousands | May 24, 2023 EUR (€) € / shares yr shares | Dec. 31, 2022 EUR (€) € / shares yr shares | Jul. 24, 2018 shares
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Kreos A BSA |  |  |
Disclosure Of Warrants Arrangements [Line Items] |  |  |
Number of outstanding warrants (in shares) | shares | 110,957 | 110,957 | 110,957
Fair value of other equity instruments | € | € 1,261 | € 275 |
Kreos A BSA | Exercise price per share (in euro per share) | Option pricing model |  |  |
Disclosure Of Warrants Arrangements [Line Items] |  |  |
Significant unobservable input, liabilities | 7.21 | 7.21 |
Kreos A BSA | Ordinary share price (in euro per share) | Option pricing model |  |  |
Disclosure Of Warrants Arrangements [Line Items] |  |  |
Significant unobservable input, liabilities | 18.57 | 6.18 |
Kreos A BSA | Residual maturity | Option pricing model |  |  |
Disclosure Of Warrants Arrangements [Line Items] |  |  |
Significant unobservable input, liabilities | yr | 0 | 5.6 |
Kreos A BSA | Volatility | Option pricing model |  |  |
Disclosure Of Warrants Arrangements [Line Items] |  |  |
Significant unobservable input, liabilities |  | 0.4401 |
Kreos A BSA | Dividend | Option pricing model |  |  |
Disclosure Of Warrants Arrangements [Line Items] |  |  |
Significant unobservable input, liabilities |  | 0 |
Kreos A BSA | Risk-free rate | Option pricing model |  |  |
Disclosure Of Warrants Arrangements [Line Items] |  |  |
Significant unobservable input, liabilities |  | 0.0298 |
Kreos B BSA |  |  |
Disclosure Of Warrants Arrangements [Line Items] |  |  |
Number of outstanding warrants (in shares) | shares | 74,766 | 74,766 | 74,766
Fair value of other equity instruments | € | € 589 | € 149 |
Kreos B BSA | Exercise price per share (in euro per share) | Option pricing model |  |  |
Disclosure Of Warrants Arrangements [Line Items] |  |  |
Significant unobservable input, liabilities | 10.70 | 10.70 |
Kreos B BSA | Ordinary share price (in euro per share) | Option pricing model |  |  |
Disclosure Of Warrants Arrangements [Line Items] |  |  |
Significant unobservable input, liabilities | 18.57 | 6.18 |
Kreos B BSA | Residual maturity | Option pricing model |  |  |
Disclosure Of Warrants Arrangements [Line Items] |  |  |
Significant unobservable input, liabilities | yr | 0 | 6.4 |
Kreos B BSA | Volatility | Option pricing model |  |  |
Disclosure Of Warrants Arrangements [Line Items] |  |  |
Significant unobservable input, liabilities |  | 0.4401 |
Kreos B BSA | Dividend | Option pricing model |  |  |
Disclosure Of Warrants Arrangements [Line Items] |  |  |
Significant unobservable input, liabilities |  | 0 |
Kreos B BSA | Risk-free rate | Option pricing model |  |  |
Disclosure Of Warrants Arrangements [Line Items] |  |  |
Significant unobservable input, liabilities |  | 0.0296 |

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