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Note 2 - Investments - Net Realized and Unrealized Investment Gains and Losses (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Investments, Debt and Equity Securities [Abstract]
Gains on sales of fixed maturity securities	$ 29	$ 42	$ 463	$ 59
Gains on sales of equity securities	0	0	234	0
Total realized gains	29	42	697	59
Losses on sales of fixed maturity securities	(25)	(328)	(783)	(330)
Losses on sales of equity securities	0	0	(235)	(1,204)
Total realized losses	(25)	(328)	(1,018)	(1,534)
Net realized investment gains (losses)	4	(286)	(321)	(1,475)
Change in allowance for credit losses	(0)	327	244	(0)
Net unrealized gains on equity securities	2,862	2,434	6,190	7,052
Net unrealized gains (losses) on equity method investment	(0)	148	2,268	(118)
Net unrealized gains on other investments	627	111	1,080	309
Net realized and unrealized gains on investments	$ 3,493	$ 2,734	$ 9,461	$ 5,768

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Amount of realized gain on investment in debt and equity securities.

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Amount of unrealized gain (loss) on investment in equity method security measured at fair value with change in fair value recognized in net income (FV-NI).

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Amount of unrealized and realized gain (loss) on investment in debt and equity securities.

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