Operating expenses - Disclosure of research and development expenses (Details) - EUR (€) € in Thousands |
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
Sep. 30, 2025 |
Sep. 30, 2024 |
Sep. 30, 2025 |
Sep. 30, 2024 |
|
| Disclosure of attribution of expenses by nature to their function [line items] | ||||
| Operating expenses | € 82,755 | € 51,514 | € 178,538 | € 138,325 |
| Research and development expenses | ||||
| Disclosure of attribution of expenses by nature to their function [line items] | ||||
| Sub-contracting, studies and research | 28,017 | 33,271 | 87,309 | 80,553 |
| Personnel costs | 23,528 | 4,868 | 34,835 | 14,659 |
| Consulting and professional fees | 3,029 | 4,156 | 8,877 | 9,644 |
| Intellectual property fees | 443 | 493 | 920 | 1,434 |
| Other research and development expenses | 399 | 497 | 1,421 | 1,646 |
| Operating expenses | € 55,416 | € 43,286 | € 133,362 | € 107,936 |