v3.26.3
Derivative financial instruments (Details)
1 Months Ended
Jun. 30, 2025
CHF (SFr)
EquityInstruments
SFr / shares
shares
Jun. 30, 2026
CHF (SFr)
Dec. 31, 2025
CHF (SFr)
Disclosure of fair value measurement of assets      
Derivative financial instruments   SFr 509,067 SFr 509,067
Measured at fair value | Level 3      
Disclosure of fair value measurement of assets      
Financial assets   795,029 795,029
Phantom shares      
Disclosure of fair value measurement of assets      
Derivative financial instruments   285,962 285,962
Financial assets   285,962 285,962
Phantom shares | Financial assets at fair value through profit or loss | Level 3      
Disclosure of fair value measurement of assets      
Financial assets   285,962 285,962
Anti-dilution protection      
Disclosure of fair value measurement of assets      
Derivative financial instruments   102,547 102,547
Financial assets   102,547 102,547
Anti-dilution protection | Financial assets at fair value through profit or loss | Level 3      
Disclosure of fair value measurement of assets      
Financial assets   102,547 102,547
Warrants      
Disclosure of fair value measurement of assets      
Derivative financial instruments   120,558 120,558
Warrants | Financial assets at fair value through profit or loss | Level 3      
Disclosure of fair value measurement of assets      
Financial assets   120,558 120,558
Warrants received with ten-year exercise period      
Disclosure of fair value measurement of assets      
Financial assets   60,547 60,547
Warrants received with five-year exercise period      
Disclosure of fair value measurement of assets      
Financial assets   60,011 60,011
Preferred shares      
Disclosure of fair value measurement of assets      
Financial assets   285,962 285,962
Preferred shares | Financial assets at fair value through other comprehensive income | Level 3      
Disclosure of fair value measurement of assets      
Financial assets   SFr 285,962 SFr 285,962
Stalicla SA      
Disclosure of fair value measurement of assets      
Phantom shares received on investment in Stalicla SA | shares 23,342    
Ordinary shares to proceeds from which phantom shares entitle | shares 23,342    
Derivative financial instruments SFr 509,067    
Amount not recorded as phantom shares due to cap on fair value SFr 111,552    
Stalicla SA | Warrants received with ten-year exercise period      
Disclosure of fair value measurement of assets      
Warrants received on investment in Stalicla SA | EquityInstruments 23,342    
Exercise period of warrants received on investment in Stalicla SA 10 years    
Strike price of warrants received on investment in Stalicla SA | SFr / shares SFr 34.05    
Ordinary shares to purchase of which warrants entitle | shares 23,342    
Stalicla SA | Warrants received with five-year exercise period      
Disclosure of fair value measurement of assets      
Warrants received on investment in Stalicla SA | EquityInstruments 3,591    
Exercise period of warrants received on investment in Stalicla SA 5 years    
Strike price of warrants received on investment in Stalicla SA | SFr / shares SFr 0.1    
Preferred shares to purchase of which warrants entitle | shares 3,591