v3.26.1
Share-based payments (Details 3)
kr / shares in Units, kr in Thousands, $ in Thousands
12 Months Ended
Dec. 31, 2025
USD ($)
shares
Dec. 31, 2025
SEK (kr)
kr / shares
shares
Dec. 31, 2024
SEK (kr)
kr / shares
shares
Notes and other explanatory information [abstract]      
Number of option, outstanding beginning | shares
Weighted average exercise price, beginning | kr / shares  
Number of option, granted during the year | shares 1,561,400 1,561,400
Weighted average exercise price, granted during the year | kr / shares   kr 72.63
Number of option, forfeited during the year | shares
Weighted average exercise price, forfeited during the year | kr / shares  
Number of option, exercised during the year | shares
Weighted average exercise price, exercised during the year | kr / shares  
Number of option, expired during the year | shares
Weighted average exercise price, expired during the year | kr / shares  
Number of option, outstanding ending | shares 1,561,400 1,561,400
Weighted average exercise price, outstanding ending | kr / shares   kr 72.63
Weighted average exercise price, outstanding ending $ 27,000 kr 258,214
Number of option, exercisable at the end of the year | shares   974,199
Number of option, exercisable at the end of the year | kr / shares   kr 72.63