Cash and cash equivalents - Narrative (Details) - EUR (€) € in Thousands |
6 Months Ended | 12 Months Ended | |
|---|---|---|---|
Jun. 30, 2025 |
Jun. 30, 2024 |
Dec. 31, 2024 |
|
| Disclosure Of Cash And Cash Equivalents [Line Items] | |||
| Notice accounts | € 12,707 | € 44,239 | |
| Effect of movements in exchange rates on cash held | (1,785) | € 1,770 | |
| United States of America, Dollars | |||
| Disclosure Of Cash And Cash Equivalents [Line Items] | |||
| Effect of movements in exchange rates on cash held | € (1,083) | € 2,035 | |