Other income (Details) - EUR (€) € in Thousands	3 Months Ended
Mar. 31, 2025	Mar. 31, 2024
Other income
Grant income	€ 222	€ 210
Total other income	€ 222	€ 210

The amount of operating income that the entity does not separately disclose in the same statement or note.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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Reference 2: http://www.xbrl.org/2003/role/exampleRef
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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration