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Financial liabilities - Disclosure of the main data and assumptions, Kreos / Claret minimum return indemnifications (Details) - Kreos & Claret minimal return indemnifications € in Thousands | Dec. 31, 2024 EUR (€) | Jun. 21, 2024 EUR (€) | Mar. 28, 2024 EUR (€)
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Tranche B |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |
Fair value of other equity instruments | € 2,636 |  | € 1,683
Tranche C |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |
Fair value of other equity instruments | € 984 | € 475 |
Final redemption scenario probability | Amortized cost (EIR method) | Tranche B |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |
Significant unobservable input, liabilities | 0.95 |  | 0.95
Final redemption scenario probability | Amortized cost (EIR method) | Tranche C |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |
Significant unobservable input, liabilities | 0.95 | 0.95 |
Minimal return | Amortized cost (EIR method) | Tranche B |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |
Significant unobservable input, liabilities | 1.40 |  | 1.40
Minimal return | Amortized cost (EIR method) | Tranche C |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |
Significant unobservable input, liabilities | 1.30 | 1.30 |
Discount rate | Amortized cost (EIR method) | Tranche B |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |
Significant unobservable input, liabilities | 0.08 |  | 0.13
Discount rate | Amortized cost (EIR method) | Tranche C |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |
Significant unobservable input, liabilities | 0.08 | 0.15 |
Probability-weighted present value of shortfall payment, final redemption | Amortized cost (EIR method) | Tranche B |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |
Significant unobservable input, liabilities | 2,635 |  | 1,959
Probability-weighted present value of shortfall payment, final redemption | Amortized cost (EIR method) | Tranche C |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |
Significant unobservable input, liabilities | 1,160 | 741 |
Probability-weighted present value of shortfall payment, tender offer | Amortized cost (EIR method) | Tranche B |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |
Significant unobservable input, liabilities | 136 |  | 68
Probability-weighted present value of shortfall payment, tender offer | Amortized cost (EIR method) | Tranche C |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |
Significant unobservable input, liabilities | 43 | 0 |
Final redemption, probability-weighted fair value with MRI | Amortized cost (EIR method) | Tranche B |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |
Significant unobservable input, liabilities | 104 |  | 1,066
Final redemption, probability-weighted fair value with MRI | Amortized cost (EIR method) | Tranche C |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |
Significant unobservable input, liabilities | 684 | 2,948 |
Final redemption, probability-weighted fair value without MRI | Amortized cost (EIR method) | Tranche B |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |
Significant unobservable input, liabilities | 241 |  | 1,410
Final redemption, probability-weighted fair value without MRI | Amortized cost (EIR method) | Tranche C |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |
Significant unobservable input, liabilities | 903 | 3,250 |
Total fair value of MRI, final redemption | Amortized cost (EIR method) | Tranche B |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |
Significant unobservable input, liabilities | 2,499 |  | 1,615
Total fair value of MRI, final redemption | Amortized cost (EIR method) | Tranche C |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |
Significant unobservable input, liabilities | 941 | 475 |
Total fair value of MRI, tender offer | Amortized cost (EIR method) | Tranche B |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |
Significant unobservable input, liabilities | 136 |  | 68
Total fair value of MRI, tender offer | Amortized cost (EIR method) | Tranche C |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |
Significant unobservable input, liabilities | 43 | 0 |

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