Note 6 - Investment Securities by Contractual Maturity (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Debt Securities, Available-for-Sale [Line Items]
Due in one year or less, Fair value	$ 8,601
Due after one year through five years, Fair value	50,606
Due after five years through ten years, Fair value	39,675
Due after ten years, Fair value	66,273
Total fair value	165,155
Investment debt securities available-for-sale, Fair value	460,418	$ 490,182
Due in one year or less, Amortized cost	8,619
Due after one year through five years, Amortized cost	57,284
Due after five years through ten years, Amortized cost	44,804
Due after ten years, Amortized cost	84,166
Total amortized cost	194,873
Investment securities available-for-sale, debt securities amortized cost	542,491	576,178
Residential Mortgage-Backed Securities [Member]
Debt Securities, Available-for-Sale [Line Items]
Investment debt securities available-for-sale, Fair value	211,783
Investment securities available-for-sale, debt securities amortized cost	247,270
Collateralized Mortgage Obligations [Member]
Debt Securities, Available-for-Sale [Line Items]
Investment debt securities available-for-sale, Fair value	83,480	89,973
Investment securities available-for-sale, debt securities amortized cost	$ 100,348	$ 106,356

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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