Note 11 - Fair Value Measurements - Fair Value of Assets and Liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Securities available for sale, at fair value (cost: 2024—$232,076; 2023—$227,716)	$ 213,164	$ 204,907
Collateralized Mortgage-Backed Securities [Member]
Securities available for sale, at fair value (cost: 2024—$232,076; 2023—$227,716)	10,328	11,181
Mortgage-Backed Security, Issued by US Government-Sponsored Enterprise [Member]
Securities available for sale, at fair value (cost: 2024—$232,076; 2023—$227,716)	132,681	133,467
US Government-sponsored Enterprises Debt Securities [Member]
Securities available for sale, at fair value (cost: 2024—$232,076; 2023—$227,716)	2,423	2,348
US States and Political Subdivisions Debt Securities [Member]
Securities available for sale, at fair value (cost: 2024—$232,076; 2023—$227,716)	49,730	39,488
Other Debt Obligations [Member]
Securities available for sale, at fair value (cost: 2024—$232,076; 2023—$227,716)	11,247	11,163
Fair Value, Recurring [Member]
Loans held for sale	155,846	164,993
Fair Value, Recurring [Member] | Mortgage Banking [Member]
Derivatives Assets, fair value	958	334
Derivatives liabilities, fair value	46	364
Fair Value, Recurring [Member] | Interest Rate Swap [Member]
Derivatives Assets, fair value	9,446	12,044
Derivatives liabilities, fair value	9,446	12,044
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Loans held for sale	0	0
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Mortgage Banking [Member]
Derivatives Assets, fair value	0	0
Derivatives liabilities, fair value	0	0
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Interest Rate Swap [Member]
Derivatives Assets, fair value	0	0
Derivatives liabilities, fair value	0	0
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Loans held for sale	155,846	164,993
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Mortgage Banking [Member]
Derivatives Assets, fair value	0	0
Derivatives liabilities, fair value	0	0
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Interest Rate Swap [Member]
Derivatives Assets, fair value	9,446	12,044
Derivatives liabilities, fair value	9,446	12,044
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Loans held for sale	0	0
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Mortgage Banking [Member]
Derivatives Assets, fair value	958	334
Derivatives liabilities, fair value	46	364
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Interest Rate Swap [Member]
Derivatives Assets, fair value	0	0
Derivatives liabilities, fair value	0	0
Fair Value, Recurring [Member] | Collateralized Mortgage-Backed Securities [Member]
Securities available for sale, at fair value (cost: 2024—$232,076; 2023—$227,716)	10,328	11,181
Fair Value, Recurring [Member] | Collateralized Mortgage-Backed Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Securities available for sale, at fair value (cost: 2024—$232,076; 2023—$227,716)	0	0
Fair Value, Recurring [Member] | Collateralized Mortgage-Backed Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Securities available for sale, at fair value (cost: 2024—$232,076; 2023—$227,716)	10,328	11,181
Fair Value, Recurring [Member] | Collateralized Mortgage-Backed Securities [Member] | Fair Value, Inputs, Level 3 [Member]
Securities available for sale, at fair value (cost: 2024—$232,076; 2023—$227,716)	0	0
Fair Value, Recurring [Member] | Mortgage-Backed Security, Issued by US Government-Sponsored Enterprise [Member]
Securities available for sale, at fair value (cost: 2024—$232,076; 2023—$227,716)	132,681	133,467
Fair Value, Recurring [Member] | Mortgage-Backed Security, Issued by US Government-Sponsored Enterprise [Member] | Fair Value, Inputs, Level 1 [Member]
Securities available for sale, at fair value (cost: 2024—$232,076; 2023—$227,716)	0	0
Fair Value, Recurring [Member] | Mortgage-Backed Security, Issued by US Government-Sponsored Enterprise [Member] | Fair Value, Inputs, Level 2 [Member]
Securities available for sale, at fair value (cost: 2024—$232,076; 2023—$227,716)	132,681	133,467
Fair Value, Recurring [Member] | Mortgage-Backed Security, Issued by US Government-Sponsored Enterprise [Member] | Fair Value, Inputs, Level 3 [Member]
Securities available for sale, at fair value (cost: 2024—$232,076; 2023—$227,716)	0	0
Fair Value, Recurring [Member] | Private Equity Funds [Member]
Securities available for sale, at fair value (cost: 2024—$232,076; 2023—$227,716)	6,755	7,260
Fair Value, Recurring [Member] | Private Equity Funds [Member] | Fair Value, Inputs, Level 1 [Member]
Securities available for sale, at fair value (cost: 2024—$232,076; 2023—$227,716)	0	0
Fair Value, Recurring [Member] | Private Equity Funds [Member] | Fair Value, Inputs, Level 2 [Member]
Securities available for sale, at fair value (cost: 2024—$232,076; 2023—$227,716)	6,755	7,260
Fair Value, Recurring [Member] | Private Equity Funds [Member] | Fair Value, Inputs, Level 3 [Member]
Securities available for sale, at fair value (cost: 2024—$232,076; 2023—$227,716)	0	0
Fair Value, Recurring [Member] | US Government-sponsored Enterprises Debt Securities [Member]
Securities available for sale, at fair value (cost: 2024—$232,076; 2023—$227,716)	2,423	2,348
Fair Value, Recurring [Member] | US Government-sponsored Enterprises Debt Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Securities available for sale, at fair value (cost: 2024—$232,076; 2023—$227,716)	0	0
Fair Value, Recurring [Member] | US Government-sponsored Enterprises Debt Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Securities available for sale, at fair value (cost: 2024—$232,076; 2023—$227,716)	2,423	2,348
Fair Value, Recurring [Member] | US Government-sponsored Enterprises Debt Securities [Member] | Fair Value, Inputs, Level 3 [Member]
Securities available for sale, at fair value (cost: 2024—$232,076; 2023—$227,716)	0	0
Fair Value, Recurring [Member] | US States and Political Subdivisions Debt Securities [Member]
Securities available for sale, at fair value (cost: 2024—$232,076; 2023—$227,716)	49,730	39,488
Fair Value, Recurring [Member] | US States and Political Subdivisions Debt Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Securities available for sale, at fair value (cost: 2024—$232,076; 2023—$227,716)	0	0
Fair Value, Recurring [Member] | US States and Political Subdivisions Debt Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Securities available for sale, at fair value (cost: 2024—$232,076; 2023—$227,716)	49,730	39,488
Fair Value, Recurring [Member] | US States and Political Subdivisions Debt Securities [Member] | Fair Value, Inputs, Level 3 [Member]
Securities available for sale, at fair value (cost: 2024—$232,076; 2023—$227,716)	0	0
Fair Value, Recurring [Member] | Other Debt Obligations [Member]
Securities available for sale, at fair value (cost: 2024—$232,076; 2023—$227,716)	11,247	11,163
Fair Value, Recurring [Member] | Other Debt Obligations [Member] | Fair Value, Inputs, Level 1 [Member]
Securities available for sale, at fair value (cost: 2024—$232,076; 2023—$227,716)	0	0
Fair Value, Recurring [Member] | Other Debt Obligations [Member] | Fair Value, Inputs, Level 2 [Member]
Securities available for sale, at fair value (cost: 2024—$232,076; 2023—$227,716)	11,247	11,163
Fair Value, Recurring [Member] | Other Debt Obligations [Member] | Fair Value, Inputs, Level 3 [Member]
Securities available for sale, at fair value (cost: 2024—$232,076; 2023—$227,716)	$ 0	$ 0