Note 16 - Fair Value Measurements - Assets Measured at Fair Value on a Recurring Basis (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Available for sale securities	$ 648,513	$ 736,389
US Treasury Securities [Member]
Available for sale securities	167,715	200,088
US Government Agencies Debt Securities [Member]
Available for sale securities	83,433	92,615
Mortgage-Backed Security, Issued by US Government-Sponsored Enterprise [Member]
Available for sale securities	91,050	101,864
US States and Political Subdivisions Debt Securities [Member]
Available for sale securities	245,562	269,891
Corporate Debt Securities [Member]
Available for sale securities	60,753	71,931
Fair Value, Recurring [Member]
Collateral dependent loans, fair value	7,923	8,327
Derivative financial instruments	996	1,225
Derivative financial instruments, liabilities	248	745
Fair Value, Recurring [Member] \| Fair Value, Inputs, Level 1 [Member]
Collateral dependent loans, fair value	0	0
Derivative financial instruments	0	0
Derivative financial instruments, liabilities	0	0
Fair Value, Recurring [Member] \| Fair Value, Inputs, Level 2 [Member]
Collateral dependent loans, fair value	7,923	8,327
Derivative financial instruments	996	1,225
Derivative financial instruments, liabilities	248	745
Fair Value, Recurring [Member] \| Fair Value, Inputs, Level 3 [Member]
Collateral dependent loans, fair value	0	0
Derivative financial instruments	0	0
Derivative financial instruments, liabilities	0	0
Fair Value, Recurring [Member] \| US Treasury Securities [Member]
Available for sale securities	167,715	200,088
Fair Value, Recurring [Member] \| US Treasury Securities [Member] \| Fair Value, Inputs, Level 1 [Member]
Available for sale securities	167,715	200,088
Fair Value, Recurring [Member] \| US Treasury Securities [Member] \| Fair Value, Inputs, Level 2 [Member]
Available for sale securities	0	0
Fair Value, Recurring [Member] \| US Treasury Securities [Member] \| Fair Value, Inputs, Level 3 [Member]
Available for sale securities	0	0
Fair Value, Recurring [Member] \| US Government Agencies Debt Securities [Member]
Available for sale securities	83,433	92,615
Fair Value, Recurring [Member] \| US Government Agencies Debt Securities [Member] \| Fair Value, Inputs, Level 1 [Member]
Available for sale securities	0	0
Fair Value, Recurring [Member] \| US Government Agencies Debt Securities [Member] \| Fair Value, Inputs, Level 2 [Member]
Available for sale securities	83,433	92,615
Fair Value, Recurring [Member] \| US Government Agencies Debt Securities [Member] \| Fair Value, Inputs, Level 3 [Member]
Available for sale securities	0	0
Fair Value, Recurring [Member] \| Mortgage-Backed Security, Issued by US Government-Sponsored Enterprise [Member]
Available for sale securities	91,050	101,864
Fair Value, Recurring [Member] \| Mortgage-Backed Security, Issued by US Government-Sponsored Enterprise [Member] \| Fair Value, Inputs, Level 1 [Member]
Available for sale securities	0	0
Fair Value, Recurring [Member] \| Mortgage-Backed Security, Issued by US Government-Sponsored Enterprise [Member] \| Fair Value, Inputs, Level 2 [Member]
Available for sale securities	91,050	101,864
Fair Value, Recurring [Member] \| Mortgage-Backed Security, Issued by US Government-Sponsored Enterprise [Member] \| Fair Value, Inputs, Level 3 [Member]
Available for sale securities	0	0
Fair Value, Recurring [Member] \| US States and Political Subdivisions Debt Securities [Member]
Available for sale securities	245,562	269,891
Fair Value, Recurring [Member] \| US States and Political Subdivisions Debt Securities [Member] \| Fair Value, Inputs, Level 1 [Member]
Available for sale securities	0	0
Fair Value, Recurring [Member] \| US States and Political Subdivisions Debt Securities [Member] \| Fair Value, Inputs, Level 2 [Member]
Available for sale securities	245,562	269,891
Fair Value, Recurring [Member] \| US States and Political Subdivisions Debt Securities [Member] \| Fair Value, Inputs, Level 3 [Member]
Available for sale securities	0	0
Fair Value, Recurring [Member] \| Corporate Debt Securities [Member]
Available for sale securities	60,753	71,931
Fair Value, Recurring [Member] \| Corporate Debt Securities [Member] \| Fair Value, Inputs, Level 1 [Member]
Available for sale securities	0	0
Fair Value, Recurring [Member] \| Corporate Debt Securities [Member] \| Fair Value, Inputs, Level 2 [Member]
Available for sale securities	60,753	71,931
Fair Value, Recurring [Member] \| Corporate Debt Securities [Member] \| Fair Value, Inputs, Level 3 [Member]
Available for sale securities	$ 0	$ 0

Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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Period Type:	instant

- Definition

Fair value, after the effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets not subject to a master netting arrangement and not elected to be offset.

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Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 825
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 10
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482907/825-10-50-10

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