Share capital (Details) - SEK (kr) |
12 Months Ended | |
|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
|
| Common Shares [Member] | ||
| IfrsStatementLineItems [Line Items] | ||
| Number of shares in issue, beginning | kr 40,677,840 | kr 40,626,609 |
| Shares issued during the year | 6,362,890 | 51,231 |
| Number of shares in issue, ending | 47,040,730 | 40,677,840 |
| Series A Preference Shares [Member] | ||
| IfrsStatementLineItems [Line Items] | ||
| Number of shares in issue, beginning | 20,762,302 | 20,762,302 |
| Shares issued during the year | ||
| Number of shares in issue, ending | 20,762,302 | 20,762,302 |
| Series B Preference Shares [Member] | ||
| IfrsStatementLineItems [Line Items] | ||
| Number of shares in issue, beginning | 24,173,854 | 24,173,854 |
| Shares issued during the year | ||
| Number of shares in issue, ending | 24,173,854 | 24,173,854 |
| Series C Preference Shares [Member] | ||
| IfrsStatementLineItems [Line Items] | ||
| Number of shares in issue, beginning | 15,135,490 | 11,936,984 |
| Shares issued during the year | 8,303,032 | 3,198,506 |
| Number of shares in issue, ending | kr 23,438,522 | kr 15,135,490 |