v3.26.3
Cash and cash equivalents (Details)
6 Months Ended 12 Months Ended
Jun. 30, 2026
CHF (SFr)
item
Dec. 31, 2025
CHF (SFr)
Jun. 30, 2025
CHF (SFr)
Dec. 31, 2024
CHF (SFr)
Cash and cash equivalents        
Cash at bank and on hand SFr 767,328 SFr 1,638,612    
Total cash and cash equivalents SFr 767,328 SFr 1,638,612 SFr 2,300,994 SFr 3,341,738
Percentage of cash and cash equivalents 100.00% 100.00%    
P-1 / A-1        
Cash and cash equivalents        
Number of Swiss banks used | item 2      
CHF        
Cash and cash equivalents        
Percentage of cash and cash equivalents 23.05% 88.80%    
USD        
Cash and cash equivalents        
Percentage of cash and cash equivalents 65.09% 4.09%    
EUR        
Cash and cash equivalents        
Percentage of cash and cash equivalents 8.75% 4.45%    
GBP        
Cash and cash equivalents        
Percentage of cash and cash equivalents 3.10% 2.67%