Notes to the income statement - Income tax (Details) - EUR (€) € in Thousands	6 Months Ended	12 Months Ended
Jun. 30, 2023	Dec. 31, 2023
Notes to the income statement
Projected tax rate		0.00%
Current taxes	€ 0

Tax rate effect on the reconciliation between the average effective tax rate and the applicable tax rate resulting from adjustments for the current tax of prior periods. [Refer: Average effective tax rate; Applicable tax rate; Adjustments for current tax of prior periods]

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 12
-IssueDate 2022-03-24
-Paragraph 81
-Subparagraph c
-Clause ii
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=12&code=ifrs-tx-2022-en-r&anchor=para_81_c_ii&doctype=Standard
-URIDate 2022-03-24

Name:	ifrs-full_TaxRateEffectOfAdjustmentsForCurrentTaxOfPriorPeriods
Namespace Prefix:	ifrs-full_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration