v3.25.4
Income Taxes (Details) - EUR (€)
€ in Thousands
12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]      
Consolidated result before corporate income taxes € (42,165) € (27,960) € (27,813)
Income tax based on domestic rate (25.8%) 10,879 7,214 7,176
Different tax rates in foreign jurisdictions (19)   (8)
Non-deductible expenses / non-taxable gains (830) (269) (289)
Share- and loan-issue expenditures that are taxable   1,117  
Change in unrecognized deductible temporary differences (47) (73) (67)
Current year losses for which no deferred tax asset was recognized (10,002) (7,989) (6,820)
True-up for prior year   197 86
Income tax (charge) / benefit € (19) € 197 € 78
Effective tax rate (0.05%) 0.70% 0.30%
Domestic rate 25.80%    
Tax loss carry-forwards € 476,000 € 437,300 € 402,300
Unused non-deductible interest expenses      
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]      
Deductible temporary differences for which no deferred tax asset is recognised € 300 € 1,300 € 2,300