Related party transactions (Details 1) - SEK (kr) |
12 Months Ended | |
|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
|
| Notes and other explanatory information [abstract] | ||
| Short-term employee benefits | kr 41,200 | kr 39,981 |
| Share-based compensation | 2,427 | |
| Post-employment benefits | 1,049 | 2,645 |
| Total | kr 44,676 | kr 42,626 |