Financial liabilities - Lease liabilities (Details) - EUR (€) € in Thousands |
3 Months Ended | ||
|---|---|---|---|
Mar. 31, 2026 |
Dec. 31, 2025 |
Mar. 31, 2025 |
|
| Disclosure Of Lease Liabilities [Line Items] | |||
| Expense on lease liabilities | € 301 | € 219 | |
| Depreciation expense, lease | 280 | 194 | |
| Interest expense on lease liabilities | 13 | 19 | |
| Expense relating to short-term leases | € 1 | € 87 | |
| PGE | |||
| Disclosure Of Lease Liabilities [Line Items] | |||
| Repayments of borrowings, classified as financing activities | € 1,264 | ||
| Lease facilities | |||
| Disclosure Of Lease Liabilities [Line Items] | |||
| Lease liability, percentage of total | 74.00% | 70.00% | |