Schedule of convertible promissory note (Details) - SEK (kr) kr in Thousands |
Dec. 31, 2025 |
Dec. 31, 2024 |
|---|---|---|
| Notes and other explanatory information [abstract] | ||
| Convertible debt instrument, host component | kr 207,716 | kr 379,795 |
| Long-term | 379,795 | |
| Short-term | 207,716 | |
| Convertible promissory note | kr 207,716 | kr 379,795 |