Analysis Of Income And Expense [Abstract]
| Concept | 2024-01-01 to 2024-12-31 | 2023-01-01 to 2023-12-31 | 
|---|---|---|
| Analysis of income and expense [abstract] | ||
| Revenue [abstract] | ||
| Interest income | 
                                                1 052
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | 
                                                1 373
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | 
| Material income and expense [abstract] | ||
| Write-downs (reversals of write-downs) of inventories [abstract] | ||
| Inventory write-down | 
                                                -
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | 
                                                43,000
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | 
| Gains (losses) on disposals of investments [abstract] | ||
| Gains (losses) on disposals of investments | 
                                                795,000
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | 
                                                961,000
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | 
| Other finance cost | 
                                                55,000
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | 
                                                44,000
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | 
| Interest expense | 
                                                1 799
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | 
                                                1 575
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | 
| Interest income (expense) | 
                                                747,000
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | 
                                                202,000
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | 
| Other operating income (expense) | 
                                                387,000
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | 
                                                91,000
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | 
| Expenses by nature [abstract] | ||
| Raw materials and consumables used | 
                                                31,000
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | 
                                                20,000
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | 
| Services expense | 
                                                254,000
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | 
                                                328,000
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | 
| Classes of employee benefits expense [abstract] | ||
| Employee benefits expense | 
                                                61,000
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | 
                                                70,000
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | 
| Depreciation, amortisation and impairment loss (reversal of impairment loss) recognised in profit or loss [abstract] | ||
| Impairment loss (reversal of impairment loss) recognised in profit or loss | 
                                                475,000
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | 
                                                67,000
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | 
| Comprehensive income, continuing and discontinued operations [abstract] | ||
| Comprehensive income | 
                                                579,000
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | 
                                                470,000
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | 
| Comprehensive income attributable to owners of parent, continuing and discontinued operations [abstract] | ||
| Comprehensive income, attributable to owners of parent | 
                                                562,000
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | 
                                                469,000
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | 
| Comprehensive income attributable to non-controlling interests, continuing and discontinued operations [abstract] | ||
| Comprehensive income, attributable to non-controlling interests | 
                                                17,000
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | 
                                                1,000
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             |