Disclosure Of Effect Of Changes In Foreign Exchange Rates [Text Block]
| Concept | 2024-01-01 to 2024-12-31 | 2024-01-01 to 2024-12-31 | 2024-01-01 to 2024-12-31 | As at 2024-12-31 | 2024-01-01 to 2024-12-31 | 2024-01-01 to 2024-12-31 | 2023-01-01 to 2023-12-31 | 2023-01-01 to 2023-12-31 | 2023-01-01 to 2023-12-31 | As at 2023-12-31 | 2023-01-01 to 2023-12-31 | 2023-01-01 to 2023-12-31 | 
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Disclosure of effect of changes in foreign exchange rates [text block] | — | — | — | — | — | — | — | — | — | — | — | — | 
| Reserve of exchange differences on translation | — | — | — | 
                                                14 1
                                                
                                                    
                                                        SEK
                                                    
                                                
                                             | — | — | — | — | — | 
                                                192,000
                                                
                                                    
                                                        SEK
                                                    
                                                
                                             | — | — | 
| Disclosure of information when currency is not exchangeable into another currency [text block] | — | — | — | — | — | — | — | — | — | — | — | — | 
| Disclosure of information when foreign operation’s functional currency is not exchangeable into presentation currency [text block] | — | — | — | — | — | — | — | — | — | — | — | — | 
| Disclosure of summarised financial information about foreign operation [text block] | — | — | — | — | — | — | — | — | — | — | — | — | 
| Disclosure of summarised financial information about foreign operation [abstract] | ||||||||||||
| Disclosure of summarised financial information about foreign operation [line items] | ||||||||||||
| Current assets | — | — | — | 
                                                69  442
                                                
                                                    
                                                        SEK
                                                    
                                                
                                             | — | — | — | — | — | 
                                                89  899
                                                
                                                    
                                                        SEK
                                                    
                                                
                                             | — | — | 
| Non-current liabilities | — | — | — | 
                                                17 423
                                                
                                                    
                                                        SEK
                                                    
                                                
                                             | — | — | — | — | — | 
                                                14 434
                                                
                                                    
                                                        SEK
                                                    
                                                
                                             | — | — | 
| Current liabilities | — | — | — | 
                                                47  420
                                                
                                                    
                                                        SEK
                                                    
                                                
                                             | — | — | — | — | — | 
                                                95 857
                                                
                                                    
                                                        SEK
                                                    
                                                
                                             | — | — | 
| Revenue | 
                                                350 349
                                                
                                                    
                                                        SEK
                                                    
                                                
                                             | — | — | — | — | — | — | — | 
                                                473 336
                                                
                                                    
                                                        SEK
                                                    
                                                
                                             | — | — | — | 
| Profit (loss) from continuing operations | 
                                                70 510
                                                
                                                    
                                                        SEK
                                                    
                                                
                                             | — | — | — | — | — | — | — | 
                                                126 794
                                                
                                                    
                                                        SEK
                                                    
                                                
                                             | — | — | — | 
| Profit (loss) from discontinued operations | 
                                                1 369
                                                
                                                    
                                                        SEK
                                                    
                                                
                                             | — | — | — | — | — | — | — | 
                                                1 020
                                                
                                                    
                                                        SEK
                                                    
                                                
                                             | — | — | — | 
| Profit (loss) | 
                                                71 879
                                                
                                                    
                                                        SEK
                                                    
                                                
                                             | — | — | — | — | 
                                                71 879
                                                
                                                    
                                                        SEK
                                                    
                                                
                                             | — | — | 
                                                125 774
                                                
                                                    
                                                        SEK
                                                    
                                                
                                             | — | 
                                                125 774
                                                
                                                    
                                                        SEK
                                                    
                                                
                                             | — | 
| Other comprehensive income | 
                                                141,000
                                                
                                                    
                                                        SEK
                                                    
                                                
                                             | — | — | — | — | — | — | — | 
                                                602,000
                                                
                                                    
                                                        SEK
                                                    
                                                
                                             | — | — | — | 
| Comprehensive income | 
                                                71 828
                                                
                                                    
                                                        SEK
                                                    
                                                
                                             | 
                                                -
                                                
                                                    
                                                        SEK
                                                    
                                                
                                             | 
                                                -
                                                
                                                    
                                                        SEK
                                                    
                                                
                                             | — | 
                                                51,000
                                                
                                                    
                                                        SEK
                                                    
                                                
                                             | 
                                                71 879
                                                
                                                    
                                                        SEK
                                                    
                                                
                                             | 
                                                -
                                                
                                                    
                                                        SEK
                                                    
                                                
                                             | 
                                                -
                                                
                                                    
                                                        SEK
                                                    
                                                
                                             | 
                                                125 680
                                                
                                                    
                                                        SEK
                                                    
                                                
                                             | — | 
                                                125 774
                                                
                                                    
                                                        SEK
                                                    
                                                
                                             | 
                                                94,000
                                                
                                                    
                                                        SEK
                                                    
                                                
                                             |