Other income/(expenses), net - Narrative (Details) - EUR (€) € in Thousands |
6 Months Ended | |
|---|---|---|
Jun. 30, 2026 |
Jun. 30, 2025 |
|
| Disclosure of attribution of expenses by nature to their function [line items] | ||
| Increase (decrease) in other operating income (expense) | € (1,600) | |
| Increase (decrease) in other operating income (expense), percentage | (35.00%) | |
| Other income and expenses, net | € 2,939 | € 4,555 |
| Grant income | 2,496 | 1,951 |
| Coalition for Epidemic Preparedness Innovations (CEPI) | IXCHIQ® | Strategic partnership agreement | ||
| Disclosure of attribution of expenses by nature to their function [line items] | ||
| Grant income | 2,300 | € 1,800 |
| Austria | ||
| Disclosure of attribution of expenses by nature to their function [line items] | ||
| Increase (decrease) in research and development tax credit | (1,600) | |
| France | ||
| Disclosure of attribution of expenses by nature to their function [line items] | ||
| Increase (decrease) in research and development tax credit | € (600) | |