v3.25.2
Note 2 - Basis of Presentation, Consolidation and Summary of Significant Accounting Policies (Details Textual)
€ / shares in Units, € in Thousands
3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2025
EUR (€)
€ / shares
shares
Jun. 30, 2024
€ / shares
shares
Jun. 30, 2025
EUR (€)
€ / shares
shares
Jun. 30, 2024
€ / shares
shares
Dec. 31, 2024
EUR (€)
Dec. 31, 2023
EUR (€)
Cash, Uninsured Amount € 0   € 0   € 0  
Contract with Customer, Liability € 12   € 12   0  
Income Tax Expense (Benefit)         € 0 € 0
Earnings Per Share, Basic | € / shares € (0.56) € (1) € 5.53 € 54.82    
Weighted Average Number of Shares Outstanding, Basic | shares 1,449,921 1,449,293 1,449,919 1,449,094    
Earnings Per Share, Diluted | € / shares € (0.56) € (1) € 0.74 € 4.62    
Weighted Average Number of Shares Outstanding, Diluted | shares 1,449,921 1,449,293 10,874,054 17,194,420    
Number of Operating Segments     1      
Minimum [Member]            
Property, Plant and Equipment, Useful Life 5 years   5 years      
Maximum [Member]            
Property, Plant and Equipment, Useful Life 7 years   7 years