Trade receivables, tax receivables and other current assets - Trade Receivables (Details) - EUR (€) € in Thousands	12 Months Ended
Dec. 31, 2021	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Trade receivables, tax receivables and other current assets
Trade receivables and others		€ 531	€ 3,807	€ 0
Increase (decrease) in trade and other current receivables.	€ (3,300)
3 months or less
Trade receivables, tax receivables and other current assets
Trade receivables and others		€ 531	€ 3,807	€ 0

The amount of current trade receivables and current other receivables. [Refer: Current trade receivables; Other current receivables]

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 1
-IssueDate 2024-01-01
-Paragraph 54
-Subparagraph h
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-URIDate 2024-03-27

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 1
-IssueDate 2024-01-01
-Paragraph 78
-Subparagraph b
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_78_b&doctype=Standard
-URIDate 2024-03-27

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Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant