Financial liabilities - Lease liabilities (Details) - EUR (€) € in Thousands |
3 Months Ended | 6 Months Ended | |||
|---|---|---|---|---|---|
Jun. 30, 2025 |
Jun. 30, 2024 |
Jun. 30, 2025 |
Jun. 30, 2024 |
Dec. 31, 2024 |
|
| Disclosure Of Lease Liabilities [Line Items] | |||||
| Expense on lease liabilities | € 428 | € 309 | |||
| Depreciation expense, lease | 362 | 405 | |||
| Interest expense on lease liabilities | € 17 | € 20 | 36 | 25 | |
| Expense relating to short-term leases | € 175 | € 77 | |||
| Lease facilities | |||||
| Disclosure Of Lease Liabilities [Line Items] | |||||
| Lease liability, percentage of total | 92.16% | 92.16% | 93.00% | ||