v3.26.1
Finance costs (Details) - SEK (kr)
kr in Thousands
12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
IfrsStatementLineItems [Line Items]    
Total finance costs kr (677,198) kr (224,345)
Interest Expense On Loans And Borrowings [Member]    
IfrsStatementLineItems [Line Items]    
Total finance costs (14,289) (119,229)
Interest Expense On Lease Liabilitie [Member]    
IfrsStatementLineItems [Line Items]    
Total finance costs (49,068) (43,730)
Interest Expense On Convertible Debenture [Member]    
IfrsStatementLineItems [Line Items]    
Total finance costs (445,181) (40,648)
Interest Expense On Liabilities Associated With Cash Advances [Member]    
IfrsStatementLineItems [Line Items]    
Total finance costs (80,108) (11,172)
Exchange Rate Losses [Member]    
IfrsStatementLineItems [Line Items]    
Total finance costs (85,851) (7,352)
Other Finance Costs [Member]    
IfrsStatementLineItems [Line Items]    
Total finance costs kr (2,701) kr (2,214)