Note 13 - Fair Value - Assets and Liabilities Measured at Fair Value on Recurring Basis (Details) - USD ($) $ in Thousands	Jun. 30, 2026	Dec. 31, 2025
Derivative assets	$ 47	$ 41
Fair Value, Recurring [Member]
Available-for-sale debt securities	239,050	132,688
Equity securities	55	55
Fair value loans	2,346	2,596
Derivative assets	47	41
Deferred compensation assets	13,265	10,951
Deferred compensation liabilities	14,797	12,479
Fair Value, Recurring [Member] \| Fair Value, Inputs, Level 1 [Member]
Available-for-sale debt securities	0	0
Equity securities	0	0
Fair value loans	0	0
Derivative assets	0	0
Deferred compensation assets	13,265	10,951
Deferred compensation liabilities	14,797	12,479
Fair Value, Recurring [Member] \| Fair Value, Inputs, Level 2 [Member]
Available-for-sale debt securities	239,050	132,688
Equity securities	55	55
Fair value loans	0	0
Derivative assets	47	41
Deferred compensation assets	0	0
Deferred compensation liabilities	0	0
Fair Value, Recurring [Member] \| Fair Value, Inputs, Level 3 [Member]
Available-for-sale debt securities	0	0
Equity securities	0	0
Fair value loans	2,346	2,596
Derivative assets	0	0
Deferred compensation assets	0	0
Deferred compensation liabilities	0	0
Fair Value, Recurring [Member] \| US Government Agencies Debt Securities [Member]
Available-for-sale debt securities	1,379
Fair Value, Recurring [Member] \| US Government Agencies Debt Securities [Member] \| Fair Value, Inputs, Level 1 [Member]
Available-for-sale debt securities	0
Fair Value, Recurring [Member] \| US Government Agencies Debt Securities [Member] \| Fair Value, Inputs, Level 2 [Member]
Available-for-sale debt securities	1,379
Fair Value, Recurring [Member] \| US Government Agencies Debt Securities [Member] \| Fair Value, Inputs, Level 3 [Member]
Available-for-sale debt securities	0
Fair Value, Recurring [Member] \| US Treasury Securities [Member]
Available-for-sale debt securities	124,750	10,929
Fair Value, Recurring [Member] \| US Treasury Securities [Member] \| Fair Value, Inputs, Level 1 [Member]
Available-for-sale debt securities	0	0
Fair Value, Recurring [Member] \| US Treasury Securities [Member] \| Fair Value, Inputs, Level 2 [Member]
Available-for-sale debt securities	124,750	10,929
Fair Value, Recurring [Member] \| US Treasury Securities [Member] \| Fair Value, Inputs, Level 3 [Member]
Available-for-sale debt securities	0	0
Fair Value, Recurring [Member] \| US States and Political Subdivisions Debt Securities [Member]
Available-for-sale debt securities	7,007	9,262
Fair Value, Recurring [Member] \| US States and Political Subdivisions Debt Securities [Member] \| Fair Value, Inputs, Level 1 [Member]
Available-for-sale debt securities	0	0
Fair Value, Recurring [Member] \| US States and Political Subdivisions Debt Securities [Member] \| Fair Value, Inputs, Level 2 [Member]
Available-for-sale debt securities	7,007	9,262
Fair Value, Recurring [Member] \| US States and Political Subdivisions Debt Securities [Member] \| Fair Value, Inputs, Level 3 [Member]
Available-for-sale debt securities	0	0
Fair Value, Recurring [Member] \| Corporate Debt Securities [Member]
Available-for-sale debt securities	19,673	24,560
Fair Value, Recurring [Member] \| Corporate Debt Securities [Member] \| Fair Value, Inputs, Level 1 [Member]
Available-for-sale debt securities	0	0
Fair Value, Recurring [Member] \| Corporate Debt Securities [Member] \| Fair Value, Inputs, Level 2 [Member]
Available-for-sale debt securities	19,673	24,560
Fair Value, Recurring [Member] \| Corporate Debt Securities [Member] \| Fair Value, Inputs, Level 3 [Member]
Available-for-sale debt securities	0	0
Fair Value, Recurring [Member] \| Mortgage-backed Agency Securities [Member]
Available-for-sale debt securities	86,241	87,937
Fair Value, Recurring [Member] \| Mortgage-backed Agency Securities [Member] \| Fair Value, Inputs, Level 1 [Member]
Available-for-sale debt securities	0	0
Fair Value, Recurring [Member] \| Mortgage-backed Agency Securities [Member] \| Fair Value, Inputs, Level 2 [Member]
Available-for-sale debt securities	86,241	87,937
Fair Value, Recurring [Member] \| Mortgage-backed Agency Securities [Member] \| Fair Value, Inputs, Level 3 [Member]
Available-for-sale debt securities	$ 0	$ 0