Note 3 - Investment Securities - Contractual Maturities (Details) - USD ($) $ in Thousands	Mar. 31, 2025	Dec. 31, 2024
Debt Securities, Available-for-Sale, Amortized Cost, Maturity, Allocated and Single Maturity Date, Year One	$ 26,722
Debt Securities, Available-for-Sale, Fair Value, Maturity, Allocated and Single Maturity Date, Year One	26,278
Debt Securities, Held-to-Maturity, Amortized Cost, Maturity, Allocated and Single Maturity Date, Year One	64
Debt Securities, Held-to-Maturity, Fair Value, Maturity, Allocated and Single Maturity Date, Year One	63
Debt Securities, Available-for-Sale, Amortized Cost, Maturity, Allocated and Single Maturity Date, after Year One Through Five	144,868
Debt Securities, Available-for-Sale, Fair Value, Maturity, Allocated and Single Maturity Date, after Year One Through Five	135,199
Debt Securities, Held-to-Maturity, Amortized Cost, Maturity, Allocated and Single Maturity Date, after Year One Through Five	991
Debt Securities, Held-to-Maturity, Fair Value, Maturity, Allocated and Single Maturity Date, after Year One Through Five	966
Debt Securities, Available-for-Sale, Amortized Cost, Maturity, Allocated and Single Maturity Date, after Year 5 Through 10	28,493
Debt Securities, Available-for-Sale, Fair Value, Maturity, Allocated and Single Maturity Date, after Year 5 Through 10	26,564
Debt Securities, Held-to-Maturity, Amortized Cost, Maturity, Allocated and Single Maturity Date, after Year 5 Through 10	9,523
Debt Securities, Held-to-Maturity, Fair Value, Maturity, Allocated and Single Maturity Date, after Year 5 Through 10	8,828
Debt Securities, Available-for-Sale, Amortized Cost, Maturity, Allocated and Single Maturity Date, after Year 10	0
Debt Securities, Available-for-Sale, Fair Value, Maturity, Allocated and Single Maturity Date, after Year 10	0
Debt Securities, Held-to-Maturity, Amortized Cost, Maturity, Allocated and Single Maturity Date, after Year 10	7,007
Debt Securities, Held-to-Maturity, Fair Value, Maturity, Allocated and Single Maturity Date, after Year 10	6,345
Debt Securities, Available-for-Sale, Amortized Cost, Maturity, Allocated and Single Maturity Date	200,083
Debt Securities, Available-for-Sale, Fair Value, Maturity, Allocated and Single Maturity Date	188,041
Debt Securities, Held-to-Maturity, Amortized Cost, Maturity, Allocated and Single Maturity Date	17,585
Debt Securities, Held-to-Maturity, Fair Value, Maturity, Allocated and Single Maturity Date	16,202
Debt Securities, Available-for-Sale, Amortized Cost	275,549	$ 282,620
Debt Securities, Available-for-Sale, Fair Value	255,891	258,327
Debt Securities, Held-to-Maturity, Amortized Cost	17,585	16,324
Debt Securities, Held-to-Maturity, Fair Value	16,202	14,928
Mortgage-Backed Security, Issued by US Government-Sponsored Enterprise [Member]
Debt Securities, Available-for-Sale, Amortized Cost, Maturity, Without Single Maturity Date	75,466
Debt Securities, Available-for-Sale, Fair Value, Maturity, Without Single Maturity Date	67,850
Debt Securities, Held-to-Maturity, Amortized Cost, Maturity, Without Single Maturity Date	0
Debt Securities, Held-to-Maturity, Fair Value, Maturity, Without Single Maturity Date	0
Debt Securities, Available-for-Sale, Amortized Cost	75,467	78,869
Debt Securities, Available-for-Sale, Fair Value	$ 67,850	$ 69,546