Operating expenses - Summary of Selling, General and Administrative Expenses (Details) - EUR (€) € in Thousands	12 Months Ended
Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Analysis of income and expense [abstract]
Purchases, fees and other expenses	€ (9,638)	€ (6,482)	€ (9,435)
Payroll costs (including share-based payments)	(9,379)	(7,789)	(9,205)
Depreciation, amortization and provision expenses	(417)	(340)	(270)
Total SG&A expenses	€ (19,434)	€ (14,611)	€ (18,909)

The amount of expense relating to selling, general and administrative activities of the entity.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 1
-IssueDate 2021-01-01
-Paragraph 85
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2021-en-r&anchor=para_85&doctype=Standard
-URIDate 2021-03-24

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration