Note 7 - Investment and Equity Securities - Amortized Cost and Fair Value of Debt Securities by Contractual Maturity (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Due in one year or less, amortized costs	$ 601
Due in one year or less, fair value	603
Due after one year through five years, amortized costs	2,709
Due after one year through five years, fair value	2,671
Due after five years through ten years, amortized costs	45,209
Due after five years through ten years, fair value	42,783
Due after ten years, amortized costs	145,292
Due after ten years, fair value	116,007
Amortized costs	193,811	$ 165,817
Fair Value	$ 162,064	$ 170,199