v3.26.1
Financial instruments (Details 3) - SEK (kr)
kr in Thousands
12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Notes and other explanatory information [abstract]    
Embedded derivative (convertible debentures) kr 4,603
Derivative instruments (warrants) 128,381 1,432
 Financial liabilities 132,984 1,432
Derivative instruments, beginning 1,432 45,028
Net gains on financial assets or liabilities measured at fair value through profit or loss 129,262 (51,315)
Finance costs 2,290 7,719
Derivative instruments, ending kr 132,984 kr 1,432