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v3.25.1

Management and assessment of financial risks (Details) | 12 Months Ended |
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Dec. 31, 2024 EUR (€) financial_institution | Dec. 31, 2023 EUR (€) | Dec. 31, 2022 EUR (€) | Aug. 20, 2023
Disclosure of credit risk exposure [line items] |  |  |  |
Operating expense | € 185,433,000 | € 131,997,000 | € 69,419,000 |
Kreos & Claret financing, tranche B and C | European Central Bank base rate |  |  |  |
Disclosure of credit risk exposure [line items] |  |  |  |
Borrowings, adjustment to interest rate basis | 7.50% |  |  | 7.50%
Interest rate collar range | 1.50% |  |  |
Kreos & Claret financing, tranche B and C | European Central Bank base rate | Bottom of range |  |  |  |
Disclosure of credit risk exposure [line items] |  |  |  |
Borrowings, interest rate basis | 2.50% |  |  | 2.50%
Kreos & Claret financing, tranche B and C | European Central Bank base rate | Top of range |  |  |  |
Disclosure of credit risk exposure [line items] |  |  |  |
Borrowings, interest rate basis | 4.00% |  |  | 4.00%
Currency risk |  |  |  |
Disclosure of credit risk exposure [line items] |  |  |  |
Reasonably possible change in risk variable, impact on foreign exchange |  |  | 0 |
Credit risk |  |  |  |
Disclosure of credit risk exposure [line items] |  |  |  |
Number of financial institutions to maintain cash | financial_institution | 2 |  |  |
Balances with banks in excess of legally insured limit | € 143,881,000 |  |  |
United States of America, Dollars |  |  |  |
Disclosure of credit risk exposure [line items] |  |  |  |
Operating expense | € 10,547,000 | 10,112,000 | € 1,390,000 |
United States of America, Dollars | Currency risk |  |  |  |
Disclosure of credit risk exposure [line items] |  |  |  |
Reasonably possible change in risk variable, percent | 10.00% |  |  |
Reasonably possible change in risk variable, impact on foreign exchange | € 291,000 | € 386,000 |  |

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