Note 3 - Investment Securities - Contractual Maturities (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Debt Securities, Available-for-Sale, Amortized Cost, Maturity, Allocated and Single Maturity Date, Year One	$ 29,992
Debt Securities, Available-for-Sale, Fair Value, Maturity, Allocated and Single Maturity Date, Year One	29,317
Debt Securities, Held-to-Maturity, Amortized Cost, after Allowance for Credit Loss, 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	143,031
Debt Securities, Available-for-Sale, Fair Value, Maturity, Allocated and Single Maturity Date, after Year One Through Five	131,434
Debt Securities, Held-to-Maturity, Amortized Cost, after Allowance for Credit Loss, 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	961
Debt Securities, Available-for-Sale, Amortized Cost, Maturity, Allocated and Single Maturity Date, after Year 5 Through 10	30,728
Debt Securities, Available-for-Sale, Fair Value, Maturity, Allocated and Single Maturity Date, after Year 5 Through 10	28,030
Debt Securities, Held-to-Maturity, Amortized Cost, after Allowance for Credit Loss, Maturity, Allocated and Single Maturity Date, after Year 5 through 10	9,638
Debt Securities, Held-to-Maturity, Fair Value, Maturity, Allocated and Single Maturity Date, after Year 5 Through 10	9,007
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, after Allowance for Credit Loss, Maturity, Allocated and Single Maturity Date, after Year 10	5,636
Debt Securities, Held-to-Maturity, Fair Value, Maturity, Allocated and Single Maturity Date, after Year 10	4,902
Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Amortized Cost	203,751
Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Fair Value	188,781
Debt Securities, Held-to-maturity, Amortized Cost	16,329
Debt Securities, Held-to-maturity, Fair Value	14,933
Debt Securities, Available-for-Sale, Amortized Cost	282,620	$ 304,805
Debt Securities, Available-for-Sale	258,327	276,601
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	16,329	16,863
Debt Securities, Held-to-Maturity, Fair Value	14,933	15,679
Mortgage-Backed Security, Issued by US Government-Sponsored Enterprise [Member]
Debt Securities, Available-for-Sale, Without Maturity, Amortized Cost	78,869
Debt Securities, Available-for-Sale, Without Maturity, Fair Value	69,546
Debt Securities, Held-to-maturity, without single maturity date, Amortized Cost	0
Debt Securities, Held-to-maturity, without single maturity date, Fair Value	0
Debt Securities, Available-for-Sale, Amortized Cost	78,869	81,634
Debt Securities, Available-for-Sale	$ 69,546	$ 72,790