v3.26.3
Right-of-use assets (Details) - CHF (SFr)
 6 Months Ended 12 Months Ended
Jun. 30, 2026
Dec. 31, 2025
Right-of-use assets    
Opening amount SFr 33,530  
Closing amount 75,721 SFr 33,530
Properties    
Right-of-use assets    
Opening amount 33,530 41,578
Additions 77,024  
Depreciation charge (34,833) (8,048)
Closing amount 75,721 33,530
Properties | Cost    
Right-of-use assets    
Opening amount 111,642  
Closing amount 188,666 111,642
Properties | Accumulated depreciation    
Right-of-use assets    
Opening amount (78,112)  
Closing amount SFr (112,945) SFr (78,112)