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Note 3 - Investments - Schedule of Available-for-sale Net Unrealized Gains or Losses (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Debt and Equity Securities, Unrealized Gain (Loss) [Abstract]      
Fixed maturities $ 30,866 $ (2,953) $ 15,185
Net increase (decrease) $ 30,866 $ (2,953) $ 15,185