v3.26.1
Cash and cash equivalents (Details)
12 Months Ended
Dec. 31, 2025
CHF (SFr)
item
Dec. 31, 2024
CHF (SFr)
Dec. 31, 2023
CHF (SFr)
Dec. 31, 2022
CHF (SFr)
Cash and cash equivalents        
Cash at bank and on hand SFr 1,638,612 SFr 3,341,738    
Total cash and cash equivalents SFr 1,638,612 SFr 3,341,738 SFr 3,865,481 SFr 6,957,086
Percentage of cash and cash equivalents 100.00% 100.00%    
Cash on hand SFr 114 SFr 115    
P-1 / A-1        
Cash and cash equivalents        
Number of Swiss banks used | item 2      
Balances with banks SFr 1,613,227 3,302,810    
P-2 / A-2        
Cash and cash equivalents        
Balances with banks 2,617 6,681    
Other        
Cash and cash equivalents        
Balances with banks SFr 22,654 SFr 32,132    
CHF        
Cash and cash equivalents        
Percentage of cash and cash equivalents 88.77% 80.84%    
USD        
Cash and cash equivalents        
Percentage of cash and cash equivalents 4.10% 14.90%    
EUR        
Cash and cash equivalents        
Percentage of cash and cash equivalents 4.46% 2.42%    
GBP        
Cash and cash equivalents        
Percentage of cash and cash equivalents 2.68% 1.84%