v3.26.3
Administration expenses (Details Narrative) - EUR (€)
€ in Thousands
6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
IfrsStatementLineItems [Line Items]    
Administration expenses € 2,575  
Administration of intangible assets 1,098
Bright hydrogen solutions [member]    
IfrsStatementLineItems [Line Items]    
Administration of intangible assets 1,098  
Bio steam energy limited [member]    
IfrsStatementLineItems [Line Items]    
Administration of intangible assets € 2,370