Note 2 - Investments - The Amortized Cost and Fair Value of Fixed Maturity Securities by Contractual Maturity (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Due within one year, Amortized Cost	$ 66,569
Due within one year, Fair Value	64,574
Due after one year through five years, Amortized Cost	176,356
Due after one year through five years, Fair Value	168,722
Due after five years through ten years, Amortized Cost	134,209
Due after five years through ten years, Fair Value	123,931
Due after ten years, Amortized Cost	43,330
Due after ten years, Fair Value	39,859
Mortgage and asset-backed securities, Amortized Cost	277,041
Mortgage and asset-backed securities, Fair Value	265,906
Amortized Cost	697,505	$ 675,130
Total, Fair Value	$ 662,992	$ 643,799

Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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