Schedule of deferred tax assets and deferred tax liabilities (Details) - SEK (kr) kr in Thousands |
Dec. 31, 2025 |
Dec. 31, 2024 |
|---|---|---|
| Notes and other explanatory information [abstract] | ||
| Deferred tax assets | kr 194,658 | kr 158,421 |
| Deferred tax liabilities | (194,395) | (164,790) |
| Total | kr 262 | kr (6,369) |