Operating expenses - Disclosure of Research and Development Expense (Details) - EUR (€) € in Thousands	12 Months Ended
Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Analysis of income and expense [abstract]
Purchases, sub-contracting and other expenses	€ (27,048)	€ (26,380)	€ (20,415)
Payroll costs (including share-based payments)	(12,345)	(10,721)	(10,868)
Depreciation, amortization and provision expenses	(1,148)	(1,295)	(1,353)
Research and development expenses	€ (40,541)	€ (38,396)	€ (32,636)

The amount of expenditure directly attributable to research or development activities, recognised in profit or loss.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 38
-IssueDate 2024-01-01
-Paragraph 126
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=38&code=ifrs-tx-2024-en-r&anchor=para_126&doctype=Standard
-URIDate 2024-03-27

Name:	ifrs-full_ResearchAndDevelopmentExpense
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration