Note 15 - Fair Value Measurement - Assets and Liabilities Measured at Fair Value on a Recurring Basis (Details) - USD ($) $ in Thousands	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Investment securities available for sale, at fair value (amortized cost of $295,849 and $376,265, respectively)	$ 270,310	$ 340,344
Servicing right fair value	3,014	3,281
Fair Value, Recurring [Member]
Servicing right fair value	3,014	3,281
Total assets measured at fair value	273,324	343,892
Fair Value, Recurring [Member] | Derivative Financial Instruments, Liabilities [Member]
Interest rate swap derivative	1,703	123
Fair Value, Recurring [Member] | Derivative Financial Instruments, Assets [Member]
Interest rate swap derivative		267
Fair Value, Inputs, Level 1 [Member] | Fair Value, Recurring [Member]
Servicing right fair value	0	0
Total assets measured at fair value	13,885	13,976
Fair Value, Inputs, Level 1 [Member] | Fair Value, Recurring [Member] | Derivative Financial Instruments, Liabilities [Member]
Interest rate swap derivative	0	0
Fair Value, Inputs, Level 1 [Member] | Fair Value, Recurring [Member] | Derivative Financial Instruments, Assets [Member]
Interest rate swap derivative		0
Fair Value, Inputs, Level 2 [Member] | Fair Value, Recurring [Member]
Servicing right fair value	0	0
Total assets measured at fair value	249,826	294,754
Fair Value, Inputs, Level 2 [Member] | Fair Value, Recurring [Member] | Derivative Financial Instruments, Liabilities [Member]
Interest rate swap derivative	1,703	123
Fair Value, Inputs, Level 2 [Member] | Fair Value, Recurring [Member] | Derivative Financial Instruments, Assets [Member]
Interest rate swap derivative		267
Fair Value, Inputs, Level 3 [Member] | Fair Value, Recurring [Member]
Servicing right fair value	3,014	3,281	$ 3,793
Total assets measured at fair value	9,613	35,162
Fair Value, Inputs, Level 3 [Member] | Fair Value, Recurring [Member] | Derivative Financial Instruments, Liabilities [Member]
Interest rate swap derivative	0	0
Fair Value, Inputs, Level 3 [Member] | Fair Value, Recurring [Member] | Derivative Financial Instruments, Assets [Member]
Interest rate swap derivative		0
US States and Political Subdivisions Debt Securities [Member]
Investment securities available for sale, at fair value (amortized cost of $295,849 and $376,265, respectively)	80,252	77,876
US States and Political Subdivisions Debt Securities [Member] | Fair Value, Recurring [Member]
Investment securities available for sale, at fair value (amortized cost of $295,849 and $376,265, respectively)	80,252	77,876
US States and Political Subdivisions Debt Securities [Member] | Fair Value, Inputs, Level 1 [Member] | Fair Value, Recurring [Member]
Investment securities available for sale, at fair value (amortized cost of $295,849 and $376,265, respectively)	11,908	12,059
US States and Political Subdivisions Debt Securities [Member] | Fair Value, Inputs, Level 2 [Member] | Fair Value, Recurring [Member]
Investment securities available for sale, at fair value (amortized cost of $295,849 and $376,265, respectively)	68,344	65,817
US States and Political Subdivisions Debt Securities [Member] | Fair Value, Inputs, Level 3 [Member] | Fair Value, Recurring [Member]
Investment securities available for sale, at fair value (amortized cost of $295,849 and $376,265, respectively)	0	0
US Government Agencies Debt Securities [Member]
Investment securities available for sale, at fair value (amortized cost of $295,849 and $376,265, respectively)	11,943	12,876
US Government Agencies Debt Securities [Member] | Fair Value, Recurring [Member]
Investment securities available for sale, at fair value (amortized cost of $295,849 and $376,265, respectively)	11,943	12,876
US Government Agencies Debt Securities [Member] | Fair Value, Inputs, Level 1 [Member] | Fair Value, Recurring [Member]
Investment securities available for sale, at fair value (amortized cost of $295,849 and $376,265, respectively)	0	0
US Government Agencies Debt Securities [Member] | Fair Value, Inputs, Level 2 [Member] | Fair Value, Recurring [Member]
Investment securities available for sale, at fair value (amortized cost of $295,849 and $376,265, respectively)	11,943	12,876
US Government Agencies Debt Securities [Member] | Fair Value, Inputs, Level 3 [Member] | Fair Value, Recurring [Member]
Investment securities available for sale, at fair value (amortized cost of $295,849 and $376,265, respectively)	0	0
Corporate Issued Asset-backed Securities [Member]
Investment securities available for sale, at fair value (amortized cost of $295,849 and $376,265, respectively)	7,961	16,122
Corporate Issued Asset-backed Securities [Member] | Fair Value, Recurring [Member]
Investment securities available for sale, at fair value (amortized cost of $295,849 and $376,265, respectively)	7,961	16,122
Corporate Issued Asset-backed Securities [Member] | Fair Value, Inputs, Level 1 [Member] | Fair Value, Recurring [Member]
Investment securities available for sale, at fair value (amortized cost of $295,849 and $376,265, respectively)	0	0
Corporate Issued Asset-backed Securities [Member] | Fair Value, Inputs, Level 2 [Member] | Fair Value, Recurring [Member]
Investment securities available for sale, at fair value (amortized cost of $295,849 and $376,265, respectively)	7,961	16,122
Corporate Issued Asset-backed Securities [Member] | Fair Value, Inputs, Level 3 [Member] | Fair Value, Recurring [Member]
Investment securities available for sale, at fair value (amortized cost of $295,849 and $376,265, respectively)	0	0
US Small Business Administration Securities [Member]
Investment securities available for sale, at fair value (amortized cost of $295,849 and $376,265, respectively)	6,293	8,666
US Small Business Administration Securities [Member] | Fair Value, Recurring [Member]
Investment securities available for sale, at fair value (amortized cost of $295,849 and $376,265, respectively)	6,293	8,666
US Small Business Administration Securities [Member] | Fair Value, Inputs, Level 1 [Member] | Fair Value, Recurring [Member]
Investment securities available for sale, at fair value (amortized cost of $295,849 and $376,265, respectively)	0	0
US Small Business Administration Securities [Member] | Fair Value, Inputs, Level 2 [Member] | Fair Value, Recurring [Member]
Investment securities available for sale, at fair value (amortized cost of $295,849 and $376,265, respectively)	6,293	8,666
US Small Business Administration Securities [Member] | Fair Value, Inputs, Level 3 [Member] | Fair Value, Recurring [Member]
Investment securities available for sale, at fair value (amortized cost of $295,849 and $376,265, respectively)	0	0
Corporate Debt Securities [Member]
Investment securities available for sale, at fair value (amortized cost of $295,849 and $376,265, respectively)	38,801	54,491
Corporate Debt Securities [Member] | Fair Value, Recurring [Member]
Investment securities available for sale, at fair value (amortized cost of $295,849 and $376,265, respectively)	38,801	54,491
Corporate Debt Securities [Member] | Fair Value, Inputs, Level 1 [Member] | Fair Value, Recurring [Member]
Investment securities available for sale, at fair value (amortized cost of $295,849 and $376,265, respectively)	1,977	1,917
Corporate Debt Securities [Member] | Fair Value, Inputs, Level 2 [Member] | Fair Value, Recurring [Member]
Investment securities available for sale, at fair value (amortized cost of $295,849 and $376,265, respectively)	36,824	52,574
Corporate Debt Securities [Member] | Fair Value, Inputs, Level 3 [Member] | Fair Value, Recurring [Member]
Investment securities available for sale, at fair value (amortized cost of $295,849 and $376,265, respectively)	0	0
Mortgage-Backed Security, Issued by US Government-Sponsored Enterprise [Member]
Investment securities available for sale, at fair value (amortized cost of $295,849 and $376,265, respectively)	91,656	98,697
Mortgage-Backed Security, Issued by US Government-Sponsored Enterprise [Member] | Fair Value, Recurring [Member]
Investment securities available for sale, at fair value (amortized cost of $295,849 and $376,265, respectively)	91,656	98,697
Mortgage-Backed Security, Issued by US Government-Sponsored Enterprise [Member] | Fair Value, Inputs, Level 1 [Member] | Fair Value, Recurring [Member]
Investment securities available for sale, at fair value (amortized cost of $295,849 and $376,265, respectively)	0	0
Mortgage-Backed Security, Issued by US Government-Sponsored Enterprise [Member] | Fair Value, Inputs, Level 2 [Member] | Fair Value, Recurring [Member]
Investment securities available for sale, at fair value (amortized cost of $295,849 and $376,265, respectively)	91,656	98,697
Mortgage-Backed Security, Issued by US Government-Sponsored Enterprise [Member] | Fair Value, Inputs, Level 3 [Member] | Fair Value, Recurring [Member]
Investment securities available for sale, at fair value (amortized cost of $295,849 and $376,265, respectively)	0	0
Mortgage-Backed Securities, Issued by Private Enterprises [Member]
Investment securities available for sale, at fair value (amortized cost of $295,849 and $376,265, respectively)	33,404	71,616
Mortgage-Backed Securities, Issued by Private Enterprises [Member] | Fair Value, Recurring [Member]
Investment securities available for sale, at fair value (amortized cost of $295,849 and $376,265, respectively)	33,404	71,616
Mortgage-Backed Securities, Issued by Private Enterprises [Member] | Fair Value, Inputs, Level 1 [Member] | Fair Value, Recurring [Member]
Investment securities available for sale, at fair value (amortized cost of $295,849 and $376,265, respectively)	0	0
Mortgage-Backed Securities, Issued by Private Enterprises [Member] | Fair Value, Inputs, Level 2 [Member] | Fair Value, Recurring [Member]
Investment securities available for sale, at fair value (amortized cost of $295,849 and $376,265, respectively)	26,805	39,735
Mortgage-Backed Securities, Issued by Private Enterprises [Member] | Fair Value, Inputs, Level 3 [Member] | Fair Value, Recurring [Member]
Investment securities available for sale, at fair value (amortized cost of $295,849 and $376,265, respectively)	$ 6,599	$ 31,881