v3.25.4
Property, plant and equipment (Details) - CHF (SFr)
SFr in Thousands
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Property, plant and equipment:      
Property, plant and equipment, beginning of period SFr 2,651 SFr 3,377  
Property, plant and equipment, end of period 1,989 2,651 SFr 3,377
Acquisition Cost      
Property, plant and equipment:      
Property, plant and equipment, beginning of period 15,119 14,372  
Additions 731 760  
Disposals (146) (13)  
Property, plant and equipment, end of period 15,704 15,119 14,372
Accumulated depreciation      
Property, plant and equipment:      
Property, plant and equipment, beginning of period (12,468) (10,996)  
Depreciation expense (1,393) (1,485) (1,700)
Disposals 146 13  
Property, plant and equipment, end of period (13,715) (12,468) (10,996)
Furniture      
Property, plant and equipment:      
Property, plant and equipment, beginning of period 75 97  
Property, plant and equipment, end of period 44 75 97
Furniture | Acquisition Cost      
Property, plant and equipment:      
Property, plant and equipment, beginning of period 333 309  
Additions 1 24  
Property, plant and equipment, end of period 334 333 309
Furniture | Accumulated depreciation      
Property, plant and equipment:      
Property, plant and equipment, beginning of period (258) (212)  
Depreciation expense (32) (46)  
Property, plant and equipment, end of period (290) (258) (212)
IT Equipment      
Property, plant and equipment:      
Property, plant and equipment, beginning of period 331 317  
Property, plant and equipment, end of period 269 331 317
IT Equipment | Acquisition Cost      
Property, plant and equipment:      
Property, plant and equipment, beginning of period 2,387 2,168  
Additions 158 219  
Property, plant and equipment, end of period 2,545 2,387 2,168
IT Equipment | Accumulated depreciation      
Property, plant and equipment:      
Property, plant and equipment, beginning of period (2,056) (1,851)  
Depreciation expense (221) (205)  
Property, plant and equipment, end of period (2,277) (2,056) (1,851)
Lab Equipment      
Property, plant and equipment:      
Property, plant and equipment, beginning of period 1,483 2,133  
Property, plant and equipment, end of period 1,182 1,483 2,133
Lab Equipment | Acquisition Cost      
Property, plant and equipment:      
Property, plant and equipment, beginning of period 10,536 10,233  
Additions 545 316  
Disposals (146) (13)  
Property, plant and equipment, end of period 10,935 10,536 10,233
Lab Equipment | Accumulated depreciation      
Property, plant and equipment:      
Property, plant and equipment, beginning of period (9,053) (8,101)  
Depreciation expense (847) (965)  
Disposals 146 13  
Property, plant and equipment, end of period (9,754) (9,053) (8,101)
Leasehold Improvements      
Property, plant and equipment:      
Property, plant and equipment, beginning of period 762 830  
Property, plant and equipment, end of period 495 762 830
Leasehold Improvements | Acquisition Cost      
Property, plant and equipment:      
Property, plant and equipment, beginning of period 1,863 1,662  
Additions 27 201  
Property, plant and equipment, end of period 1,890 1,863 1,662
Leasehold Improvements | Accumulated depreciation      
Property, plant and equipment:      
Property, plant and equipment, beginning of period (1,101) (832)  
Depreciation expense (293) (269)  
Property, plant and equipment, end of period SFr (1,395) SFr (1,101) SFr (832)