v3.26.1
Other current assets (Details) - CHF (SFr)
12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Other current assets    
Other financial assets SFr 5,130 SFr 6,496
Trade and other receivables 20,087 15,513
Prepayments 16,295 169,649
Other short-term assets   7,967
Total other current assets 41,512 199,625
Increase (decrease) in other current assets (200,000)  
Accumulated impairment | Contract assets and trade and other receivables    
Other current assets    
Expected loss allowance SFr 0 SFr 0