Statement Of Cash Flows [Abstract]
| Concept | 2023-01-01 to 2023-12-31 | As at 2023-12-31 | As at 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] | |||||
| Classes of cash receipts from operating activities [abstract] | |||||
| Receipts from sales of goods and rendering of services | 
                                                1 747
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | — | — | 
                                                2  227
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | — | 
| Classes of cash payments from operating activities [abstract] | |||||
| Payments to suppliers for goods and services | 
                                                1,187,000
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | — | — | 
                                                1,128,000
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | — | 
| Payments to and on behalf of employees | 
                                                216,000
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | — | — | 
                                                189,000
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | — | 
| Income taxes paid (refund), classified as operating activities | 
                                                186,000
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | — | — | 
                                                54,000
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | — | 
| Other inflows (outflows) of cash, classified as operating activities | 
                                                3,588,000
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | — | — | 
                                                361,000
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | — | 
| Cash flows from (used in) operating activities | 
                                                3 746
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | — | — | 
                                                495,000
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | — | 
| Cash flows from (used in) investing activities [abstract] | |||||
| Cash flows from losing control of subsidiaries or other businesses, classified as investing activities | 
                                                1,924,000
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | — | — | 
                                                -
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | — | 
| Cash flows used in obtaining control of subsidiaries or other businesses, classified as investing activities | 
                                                47 7
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | — | — | 
                                                -
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | — | 
| Purchase of property, plant and equipment, classified as investing activities | 
                                                80,000
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | — | — | 
                                                2,000
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | — | 
| Cash advances and loans made to other parties, classified as investing activities | 
                                                1,091,000
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | — | — | 
                                                23,000
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | — | 
| Cash receipts from repayment of advances and loans made to other parties, classified as investing activities | 
                                                1,683,000
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | — | — | 
                                                -
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | — | 
| Interest paid, classified as investing activities | 
                                                5,000
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | — | — | 
                                                -
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | — | 
| Interest received, classified as investing activities | 
                                                444,000
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | — | — | 
                                                1 831
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | — | 
| Cash flows from (used in) investing activities | 
                                                1 558
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | — | — | 
                                                27,517,000
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | — | 
| Cash flows from (used in) financing activities [abstract] | |||||
| Proceeds from issuing shares | 
                                                -
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | — | — | 
                                                31 500
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | — | 
| Proceeds from borrowings, classified as financing activities | 
                                                25 954
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | — | — | 
                                                15 255
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | — | 
| Repayments of borrowings, classified as financing activities | 
                                                32 038
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | — | — | 
                                                17,019,000
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | — | 
| Interest paid, classified as financing activities | 
                                                1 129
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | — | — | 
                                                2,541,000
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | — | 
| Other inflows (outflows) of cash, classified as financing activities | 
                                                9,000
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | — | — | 
                                                351,000
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | — | 
| Cash flows from (used in) financing activities | 
                                                5 848
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | — | — | 
                                                27 546
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | — | 
| Increase (decrease) in cash and cash equivalents before effect of exchange rate changes | 
                                                544,000
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | — | — | 
                                                524,000
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | — | 
| Increase (decrease) in cash and cash equivalents after effect of exchange rate changes | 
                                                544,000
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | — | — | 
                                                524,000
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | — | 
| Cash and cash equivalents | — | 
                                                1 193
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | 
                                                1 737
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | — | 
                                                1 213
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             |