v3.26.1
Share-based payments (Details 1) - Options [Member] - kr / shares
12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
IfrsStatementLineItems [Line Items]    
Weighted average share price (SEK) kr 0.6248 kr 0.8471
Weighted average exercise price (SEK) kr 0.7154 kr 1.0054
Expected volatility 35.00% 35.00%
Expected life 1 year 4 years
Risk-free interest rate 3.70%  
Top Of Ranges [Member]    
IfrsStatementLineItems [Line Items]    
Risk-free interest rate   4.40%
Bottom Of Ranges [Member]    
IfrsStatementLineItems [Line Items]    
Risk-free interest rate   4.70%