Financial liabilities - Lease liabilities (Details) - EUR (€) € in Thousands |
3 Months Ended | 9 Months Ended | |||
|---|---|---|---|---|---|
Sep. 30, 2025 |
Sep. 30, 2024 |
Sep. 30, 2025 |
Sep. 30, 2024 |
Dec. 31, 2024 |
|
| Disclosure Of Lease Liabilities [Line Items] | |||||
| Expense on lease liabilities | € 637 | € 412 | |||
| Depreciation expense, lease | 568 | 591 | |||
| Interest expense on lease liabilities | € 15 | € 18 | 51 | 43 | |
| Expense relating to short-term leases | € 172 | € 251 | |||
| Lease facilities | |||||
| Disclosure Of Lease Liabilities [Line Items] | |||||
| Lease liability, percentage of total | 96.00% | 96.00% | 93.00% | ||