Notes to the interim condensed consolidated statement of (income) loss - Income tax (Details) - EUR (€) € in Thousands	6 Months Ended	12 Months Ended
Jun. 30, 2025	Dec. 31, 2025
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Current taxes	€ 0
Forecast
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Current taxes		€ 0

The amount of current tax expense (income) and adjustments for the current tax of prior periods. [Refer: Current tax expense (income); Adjustments for current tax of prior periods]

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 12
-IssueDate 2024-01-01
-Paragraph 80
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=12&code=ifrs-tx-2024-en-r&anchor=para_80&doctype=Standard
-URIDate 2024-03-27

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