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Disclosure on Individual Items of the Consolidated Financial Statements - Schedule of Deferred Tax Assets Recognized for Tax Loss Carryforwards (Details) - EUR (€)
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
USA [Member]      
Germany      
Deferred tax assets € 21,137 € 20,330 € 16,281
Expiration Non-expiring Non-expiring Non-expiring
Ireland [Member]      
Germany      
Deferred tax assets [1] € 4,462 € 3,699 € 4,616
Expiration [1] Non-expiring Non-expiring Non-expiring
Austria [Member]      
Germany      
Deferred tax assets € 455,000    
Expiration Non-expiring    
thereof corporation tax [Member]      
Germany      
Deferred tax assets € 148,945 € 114,590 € 114,803
Expiration Non-expiring Non-expiring Non-expiring
thereof trade tax [Member]      
Germany      
Deferred tax assets € 146,512 € 108,689 € 112,540
Expiration Non-expiring Non-expiring Non-expiring
thereof interest carryforward [Member]      
Germany      
Deferred tax assets € 9,262    
Expiration Non-expiring    
[1] Amount relates to management expenses that can be set-off against future profits