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 | 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 | 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 | 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 | 2023-01-01 to 2023-12-31 | 
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Disclosure of effect of changes in foreign exchange rates [text block] | — | — |  | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 
| 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] | ||||||||||||||||||
| Non-current assets | — | — | — | — | 
                                                38 385
                                                
                                                    
                                                        SEK
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | 
                                                26 664
                                                
                                                    
                                                        SEK
                                                    
                                                
                                             | — | — | — | — | 
| Current assets | — | — | — | — | 
                                                45 204
                                                
                                                    
                                                        SEK
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | 
                                                41 120
                                                
                                                    
                                                        SEK
                                                    
                                                
                                             | — | — | — | — | 
| Non-current liabilities | — | — | — | — | 
                                                22 157
                                                
                                                    
                                                        SEK
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | 
                                                13 571
                                                
                                                    
                                                        SEK
                                                    
                                                
                                             | — | — | — | — | 
| Current liabilities | — | — | — | — | 
                                                18 252
                                                
                                                    
                                                        SEK
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | 
                                                17 003
                                                
                                                    
                                                        SEK
                                                    
                                                
                                             | — | — | — | — | 
| Profit (loss) | 
                                                25,000,000
                                                
                                                    
                                                        SEK
                                                    
                                                
                                             | 
                                                –
                                                
                                                    
                                                        SEK
                                                    
                                                
                                             | 
                                                8 756
                                                
                                                    
                                                        SEK
                                                    
                                                
                                             | 
                                                –
                                                
                                                    
                                                        SEK
                                                    
                                                
                                             | — | 
                                                –
                                                
                                                    
                                                        SEK
                                                    
                                                
                                             | 
                                                –
                                                
                                                    
                                                        SEK
                                                    
                                                
                                             | 
                                                8 731
                                                
                                                    
                                                        SEK
                                                    
                                                
                                             | 
                                                8 731
                                                
                                                    
                                                        SEK
                                                    
                                                
                                             | 
                                                –
                                                
                                                    
                                                        SEK
                                                    
                                                
                                             | 
                                                –
                                                
                                                    
                                                        SEK
                                                    
                                                
                                             | 
                                                –
                                                
                                                    
                                                        SEK
                                                    
                                                
                                             | 
                                                9 458
                                                
                                                    
                                                        SEK
                                                    
                                                
                                             | — | 
                                                27,000,000
                                                
                                                    
                                                        SEK
                                                    
                                                
                                             | 
                                                –
                                                
                                                    
                                                        SEK
                                                    
                                                
                                             | 
                                                9 431
                                                
                                                    
                                                        SEK
                                                    
                                                
                                             | 
                                                9 431
                                                
                                                    
                                                        SEK
                                                    
                                                
                                             | 
| Other comprehensive income | 
                                                3,000,000
                                                
                                                    
                                                        SEK
                                                    
                                                
                                             | 
                                                –
                                                
                                                    
                                                        SEK
                                                    
                                                
                                             | 
                                                1 589
                                                
                                                    
                                                        SEK
                                                    
                                                
                                             | 
                                                29,000,000
                                                
                                                    
                                                        SEK
                                                    
                                                
                                             | — | 
                                                1 456
                                                
                                                    
                                                        SEK
                                                    
                                                
                                             | 
                                                –
                                                
                                                    
                                                        SEK
                                                    
                                                
                                             | 
                                                1 586
                                                
                                                    
                                                        SEK
                                                    
                                                
                                             | 
                                                159,000,000
                                                
                                                    
                                                        SEK
                                                    
                                                
                                             | 
                                                –
                                                
                                                    
                                                        SEK
                                                    
                                                
                                             | 
                                                –
                                                
                                                    
                                                        SEK
                                                    
                                                
                                             | 
                                                1 356
                                                
                                                    
                                                        SEK
                                                    
                                                
                                             | 
                                                1 742
                                                
                                                    
                                                        SEK
                                                    
                                                
                                             | — | 
                                                16,000,000
                                                
                                                    
                                                        SEK
                                                    
                                                
                                             | 
                                                64,000,000
                                                
                                                    
                                                        SEK
                                                    
                                                
                                             | 
                                                306,000,000
                                                
                                                    
                                                        SEK
                                                    
                                                
                                             | 
                                                1 726
                                                
                                                    
                                                        SEK
                                                    
                                                
                                             | 
| Comprehensive income | 
                                                28,000,000
                                                
                                                    
                                                        SEK
                                                    
                                                
                                             | 
                                                –
                                                
                                                    
                                                        SEK
                                                    
                                                
                                             | 
                                                10 345
                                                
                                                    
                                                        SEK
                                                    
                                                
                                             | 
                                                29,000,000
                                                
                                                    
                                                        SEK
                                                    
                                                
                                             | — | 
                                                1 456
                                                
                                                    
                                                        SEK
                                                    
                                                
                                             | 
                                                –
                                                
                                                    
                                                        SEK
                                                    
                                                
                                             | 
                                                10 317
                                                
                                                    
                                                        SEK
                                                    
                                                
                                             | 
                                                8 890
                                                
                                                    
                                                        SEK
                                                    
                                                
                                             | 
                                                –
                                                
                                                    
                                                        SEK
                                                    
                                                
                                             | 
                                                –
                                                
                                                    
                                                        SEK
                                                    
                                                
                                             | 
                                                1 356
                                                
                                                    
                                                        SEK
                                                    
                                                
                                             | 
                                                7 716
                                                
                                                    
                                                        SEK
                                                    
                                                
                                             | — | 
                                                10,000,000
                                                
                                                    
                                                        SEK
                                                    
                                                
                                             | 
                                                64,000,000
                                                
                                                    
                                                        SEK
                                                    
                                                
                                             | 
                                                9 126
                                                
                                                    
                                                        SEK
                                                    
                                                
                                             | 
                                                7 706
                                                
                                                    
                                                        SEK
                                                    
                                                
                                             |