v3.26.3
Material accounting estimates and judgments - (Details) - Neurosterix US Holdings LLC - CHF (SFr)
3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Material accounting estimates and judgments          
Equity interest received 20.00%        
Impairment loss   SFr 0 SFr 0 SFr 0 SFr 0