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Commitments and contingencies (Details Narrative) - EUR (€)
6 Months Ended 12 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Dec. 31, 2024
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]      
Principal amount € 5,425,000    
Rent payment € 16,141    
OSR [Member]      
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]      
Percentage of royalties 4.00%    
San Raffaele Hospital [Member]      
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]      
Costs and expenses, related party € 1,400,000 € 900,000  
Manufacturing costs € 12,300,000    
Original OSR License Agreement [Member]      
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]      
Other commitments description In particular, consistent with the terms of the Original OSR License Agreement, the ARLA continues to require the Company to invest (a) at least €5,425,000 with respect to the development of the licensed products, and (b) at least €2,420,000 with respect to the manufacturing of such licensed products (subject to certain adjustments)    
Master Service Agreement [Member]      
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]      
Production costs € 2,800,000   € 3,500,000