Operating expenses - Disclosure of Research and Development Expense (Details) - EUR (€) € in Thousands |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
|
| Analysis of income and expense [abstract] | |||
| Purchases, sub-contracting and other expenses | € (9,755) | € (27,048) | € (26,380) |
| Payroll costs (including share-based payments) | (12,206) | (12,345) | (10,721) |
| Depreciation, amortization and provision expenses | (1,154) | (1,148) | (1,295) |
| Research and development expenses | € (23,115) | € (40,541) | € (38,396) |