Balance sheet
| 
       
  | 
    
       
  | 
    
       
  | 
    
       
  | 
    
       
  | 
    
       
  | 
    
       
  | 
  
| 
       In thousands of CHF  | 
    
       Dec. 31, 2023  | 
    
       %  | 
    
       
  | 
    
       Dec. 31, 2022  | 
    
       %  | 
  |
| 
       Assets  | 
    
       
  | 
    
       
  | 
    
       
  | 
    
       
  | 
    
       
  | 
    
       
  | 
  
| 
       Cash and cash equivalents  | 
    
       
  | 
    
       441  | 
    
       
  | 
    
       
  | 
    
       4,150  | 
    
       
  | 
  
| 
       Other current receivables from subsidiaries  | 
    
       
  | 
    
       —  | 
    
       
  | 
    
       
  | 
    
       325  | 
    
       
  | 
  
| 
       Prepaid expenses  | 
    
       
  | 
    
       528  | 
    
       
  | 
    
       
  | 
    
       363  | 
    
       
  | 
  
| 
       Total current assets  | 
    
       
  | 
    
       969  | 
    
       0.5%  | 
    
       
  | 
    
       4,837  | 
    
       2.3%  | 
  
| 
       Non-current financial assets – loans  | 
    
       120,486  | 
    
       
  | 
    
       
  | 
    
       118,162  | 
    
       
  | 
  |
| 
       Investments in subsidiaries  | 
    
       86,632  | 
    
       
  | 
    
       
  | 
    
       86,632  | 
    
       
  | 
  |
| 
       Total non-current assets  | 
    
       
  | 
    
       207,118  | 
    
       99.5%  | 
    
       
  | 
    
       204,794  | 
    
       97.7%  | 
  
| 
       Total assets  | 
    
       
  | 
    
       208,087  | 
    
       100.0%  | 
    
       
  | 
    
       209,632  | 
    
       100.0%  | 
  
| 
       
  | 
    
       
  | 
    
       
  | 
    
       
  | 
    
       
  | 
    
       
  | 
    
       
  | 
  
| 
       Liabilities and shareholders' equity  | 
    
       
  | 
    
       
  | 
    
       
  | 
    
       
  | 
    
       
  | 
    
       
  | 
  
| 
       Other current liabilities to non-Group entities  | 
    
       
  | 
    
       300  | 
    
       
  | 
    
       
  | 
    
       80  | 
    
       
  | 
  
| 
       Other current liabilities to shareholders and governing bodies  | 
    
       
  | 
    
       276  | 
    
       
  | 
    
       
  | 
    
       237  | 
    
       
  | 
  
| 
       Accrued expenses  | 
    
       
  | 
    
       965  | 
    
       
  | 
    
       
  | 
    
       1,190  | 
    
       
  | 
  
| 
       Non-current interest-bearing liabilities  | 
    
       60,000  | 
    
       
  | 
    
       
  | 
    
       60,000  | 
    
       
  | 
  |
| 
       Total liabilities  | 
    
       
  | 
    
       61,541  | 
    
       29.6%  | 
    
       
  | 
    
       61,508  | 
    
       29.3%  | 
  
| 
       Capital stock  | 
    
       7,774  | 
    
       
  | 
    
       
  | 
    
       7,774  | 
    
       
  | 
  |
| 
       Treasury stock  | 
    
       
  | 
    
       (491)  | 
    
       
  | 
    
       
  | 
    
       —  | 
    
       
  | 
  
| 
       Statutory capital reserve  | 
    
       
  | 
    
       2,986  | 
    
       
  | 
    
       
  | 
    
       3,005  | 
    
       
  | 
  
| 
       Statutory earnings reserve  | 
    
       
  | 
    
       4,967  | 
    
       
  | 
    
       
  | 
    
       4,967  | 
    
       
  | 
  
| 
       Retained earnings brought forward  | 
    
       
  | 
    
       103,692  | 
    
       
  | 
    
       
  | 
    
       102,232  | 
    
       
  | 
  
| 
       Net income for the year  | 
    
       
  | 
    
       27,618  | 
    
       
  | 
    
       
  | 
    
       30,147  | 
    
       
  | 
  
| 
       Total shareholders' equity  | 
    
       
  | 
    
       146,546  | 
    
       70.4%  | 
    
       
  | 
    
       148,124  | 
    
       70.7%  | 
  
| 
       Total liabilities and shareholders' equity  | 
    
       
  | 
    
       208,087  | 
    
       100.0%  | 
    
       
  | 
    
       209,632  | 
    
       100.0%  |