Borrowings - Schedule of reconciliation of loan (Details) - EUR (€) € in Thousands |
6 Months Ended | 12 Months Ended |
|---|---|---|
Jun. 30, 2026 |
Dec. 31, 2025 |
|
| Disclosure of detailed information about borrowings [line items] | ||
| Borrowings, beginning period | € 179,167 | |
| Borrowings, ending period | 184,060 | € 179,167 |
| Less: non-current portion | (165,631) | (161,261) |
| CURRENT PORTION | 18,428 | 17,905 |
| Pharmakon loan due 2030 and amended Debt financing agreement due 2028 | ||
| Disclosure of detailed information about borrowings [line items] | ||
| Borrowings, beginning period | 173,407 | 180,841 |
| Proceeds of issue | 0 | 182,979 |
| Transaction costs | 0 | (10,130) |
| Principal repayment | 0 | (170,213) |
| Accrued interest | 9,721 | 28,403 |
| Payment of interest | (8,505) | (17,558) |
| Exchange rate difference | 5,428 | (20,916) |
| Borrowings, ending period | 180,052 | 173,407 |
| Less: non-current portion | (162,833) | (156,710) |
| CURRENT PORTION | € 17,218 | € 16,697 |