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 | 
                                                14 814
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | — | — | 
                                                24 553
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | — | 
| Classes of cash payments from operating activities [abstract] | |||||
| Payments to suppliers for goods and services | 
                                                3 086
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | — | — | 
                                                15 114
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | — | 
| Payments to and on behalf of employees | 
                                                1 391
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | — | — | 
                                                987,000
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | — | 
| Income taxes paid (refund), classified as operating activities | 
                                                3 685
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | — | — | 
                                                189,000
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | — | 
| Other inflows (outflows) of cash, classified as operating activities | 
                                                14,000
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | — | — | 
                                                235,000
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | — | 
| Cash flows from (used in) operating activities | 
                                                6 638
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | — | — | 
                                                8 498
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | — | 
| Cash flows from (used in) investing activities [abstract] | |||||
| Cash advances and loans made to other parties, classified as investing activities | 
                                                330,000
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | — | — | 
                                                612,000
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | — | 
| Cash receipts from repayment of advances and loans made to other parties, classified as investing activities | 
                                                330,000
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | — | — | 
                                                957,000
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | — | 
| Other inflows (outflows) of cash, classified as investing activities | 
                                                38,000
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | — | — | 
                                                -
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | — | 
| Cash flows from (used in) investing activities | 
                                                38,000
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | — | — | 
                                                345,000
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | — | 
| Cash flows from (used in) financing activities [abstract] | |||||
| Repayments of borrowings, classified as financing activities | 
                                                5 092
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | — | — | 
                                                7 245
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | — | 
| Interest paid, classified as financing activities | 
                                                976,000
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | — | — | 
                                                1 542
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | — | 
| Other inflows (outflows) of cash, classified as financing activities | 
                                                44,000
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | — | — | 
                                                60,000
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | — | 
| Cash flows from (used in) financing activities | 
                                                6 112
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | — | — | 
                                                8 847
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | — | 
| Increase (decrease) in cash and cash equivalents before effect of exchange rate changes | 
                                                564,000
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | — | — | 
                                                4,000
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | — | 
| Cash and cash equivalents | — | 
                                                915,000
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | 
                                                351,000
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | — | 
                                                355,000
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             |