Statement Of Cash Flows [Abstract]
| Concept | 2023-01-01 to 2023-12-31 | 2023-01-01 to 2023-12-31 | As at 2023-12-31 | 2023-01-01 to 2023-12-31 | 2023-01-01 to 2023-12-31 | 2023-01-01 to 2023-12-31 | As at 2022-12-31 | 2022-01-01 to 2022-12-31 | 2022-01-01 to 2022-12-31 | 2022-01-01 to 2022-12-31 | 2022-01-01 to 2022-12-31 | 2022-01-01 to 2022-12-31 | As at 2021-12-31 | 
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of cash flows [abstract] | |||||||||||||
| Cash flows from (used in) operating activities [abstract] | |||||||||||||
| Profit (loss) | 
                                                -
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | 
                                                147,000
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | — | 
                                                147,000
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | 
                                                -
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | 
                                                -
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | — | 
                                                -
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | 
                                                -
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | 
                                                2 717
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | 
                                                -
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | 
                                                2 717
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | — | 
| Income taxes paid (refund), classified as operating activities | — | 
                                                18,000
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | — | — | — | — | — | — | — | 
                                                41,000
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | — | — | — | 
| Other inflows (outflows) of cash, classified as operating activities | — | 
                                                1 358
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | — | — | — | — | — | — | — | 
                                                6,000
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | — | — | — | 
| Cash flows from (used in) operating activities | — | 
                                                1 020
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | — | — | — | — | — | — | — | 
                                                279,000
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | — | — | — | 
| Cash flows from (used in) investing activities [abstract] | |||||||||||||
| Cash flows used in obtaining control of subsidiaries or other businesses, classified as investing activities | — | 
                                                1 164
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | — | — | — | — | — | — | — | 
                                                -
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | — | — | — | 
| Purchase of property, plant and equipment, classified as investing activities | — | 
                                                -
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | — | — | — | — | — | — | — | 
                                                4,000
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | — | — | — | 
| Other inflows (outflows) of cash, classified as investing activities | — | 
                                                2,000
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | — | — | — | — | — | — | — | 
                                                -
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | — | — | — | 
| Cash flows from (used in) investing activities | — | 
                                                2 576
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | — | — | — | — | — | — | — | 
                                                1 302
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | — | — | — | 
| Cash flows from (used in) financing activities [abstract] | |||||||||||||
| Proceeds from borrowings, classified as financing activities | — | 
                                                151,000
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | — | — | — | — | — | — | — | 
                                                352,000
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | — | — | — | 
| Repayments of borrowings, classified as financing activities | — | 
                                                1 079
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | — | — | — | — | — | — | — | 
                                                17,000
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | — | — | — | 
| Interest paid, classified as financing activities | — | 
                                                2 225
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | — | — | — | — | — | — | — | 
                                                1 360
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | — | — | — | 
| Other inflows (outflows) of cash, classified as financing activities | — | 
                                                84,000
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | — | — | — | — | — | — | — | 
                                                295,000
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | — | — | — | 
| Cash flows from (used in) financing activities | — | 
                                                3 258
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | — | — | — | — | — | — | — | 
                                                1 342
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | — | — | — | 
| Increase (decrease) in cash and cash equivalents before effect of exchange rate changes | — | 
                                                338,000
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | — | — | — | — | — | — | — | 
                                                319,000
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | — | — | — | 
| Cash and cash equivalents | — | — | 
                                                416,000
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | — | — | — | 
                                                78,000
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | — | — | — | — | — | 
                                                397,000
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             |