Financial liabilities - Disclosure of variation in lease liabilities (Details) - EUR (€) € in Thousands	3 Months Ended
Mar. 31, 2025	Mar. 31, 2024
Disclosure of financial liabilities [abstract]
Lease liabilities at beginning of period	€ 2,363	€ 540
Increase		6
Decrease	(241)	(177)
Lease liabilities at end of period	€ 2,122	€ 369

The amount of liabilities related to the entity's leases. Lease is a contract, or part of a contract, that conveys the right to use an underlying asset for a period of time in exchange for consideration.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 16
-IssueDate 2024-01-01
-Paragraph 47
-Subparagraph b
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=16&code=ifrs-tx-2024-en-r&anchor=para_47_b&doctype=Standard
-URIDate 2024-03-27

Name:	ifrs-full_LeaseLiabilities
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant