v3.25.2
Contract revenues and other operating income - Anti-Abeta Active Immunotherapy in AD - 2024 agreement Takeda Pharmaceuticals, USA Inc. (Details)
SFr in Thousands, $ in Millions
1 Months Ended 3 Months Ended 6 Months Ended
May 31, 2024
CHF (SFr)
May 31, 2024
USD ($)
Jun. 30, 2025
CHF (SFr)
Jun. 30, 2024
CHF (SFr)
Jun. 30, 2025
CHF (SFr)
Jun. 30, 2024
CHF (SFr)
May 31, 2024
USD ($)
Disclosure of disaggregation of revenue from contracts with customers [line items]              
Period to provide notice of termination of agreement 90 days 90 days          
Contract revenue     SFr 1,306 SFr 687 SFr 2,296 SFr 687  
Anti-Abeta Active Immunotherapy in AD- 2024 agreement Takeda Pharmaceuticals, USA, Inc.              
Disclosure of disaggregation of revenue from contracts with customers [line items]              
Collaborative agreement, upfront payments received SFr 92,300 $ 100.0          
Transaction price SFr 92,300           $ 100.0
Number of development milestones that may occur prior to option exercise included in transaction price 0           0
Contract revenue     1,306 SFr 687 2,296 SFr 687  
Deferred revenue     SFr 87,300   SFr 87,300    
Anti-Abeta Active Immunotherapy in AD- 2024 agreement Takeda Pharmaceuticals, USA, Inc. | License option and development, CMC and regulatory activities              
Disclosure of disaggregation of revenue from contracts with customers [line items]              
Transaction price SFr 92,300           $ 100.0
Anti-Abeta Active Immunotherapy in AD- 2024 agreement Takeda Pharmaceuticals, USA, Inc. | License option              
Disclosure of disaggregation of revenue from contracts with customers [line items]              
Transaction price SFr 80,700           87.4
Anti-Abeta Active Immunotherapy in AD- 2024 agreement Takeda Pharmaceuticals, USA, Inc. | Development, CMC and regulatory activities              
Disclosure of disaggregation of revenue from contracts with customers [line items]              
Number of performance obligations identified 1 1          
Transaction price SFr 11,600           12.6
Anti-Abeta Active Immunotherapy in AD- 2024 agreement Takeda Pharmaceuticals, USA, Inc. | Maximum              
Disclosure of disaggregation of revenue from contracts with customers [line items]              
Collaborative agreement, potential receivables for option exercise fee and potential development, commercial and sales-based milestones SFr 1,700,000           $ 2,100.0