Note 4 - Fair Value Measurements - Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Debt securities available for sale (at fair value)	$ 502,762	$ 405,201
Equity investments (at fair value)	10,958	29,494
Fair Value, Recurring [Member]
Debt securities available for sale (at fair value)	502,762	405,201
Equity investments (at fair value)	10,958	29,494
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Debt securities available for sale (at fair value)	0	0
Equity investments (at fair value)	6,557	25,766
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Debt securities available for sale (at fair value)	498,155	403,361
Equity investments (at fair value)	4,401	3,728
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Debt securities available for sale (at fair value)	4,607	1,840
Equity investments (at fair value)	0	0
US Government Corporations and Agencies Securities [Member]
Debt securities available for sale (at fair value)	22,825	20,219
US Government Corporations and Agencies Securities [Member] | Fair Value, Recurring [Member]
Debt securities available for sale (at fair value)	22,825	20,219
US Government Corporations and Agencies Securities [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Debt securities available for sale (at fair value)	0	0
US Government Corporations and Agencies Securities [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Debt securities available for sale (at fair value)	22,825	20,219
US Government Corporations and Agencies Securities [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Debt securities available for sale (at fair value)	0	0
Government Sponsored Agencies [Member]
Debt securities available for sale (at fair value)	129,567	51,456
Government Sponsored Agencies [Member] | Fair Value, Recurring [Member]
Debt securities available for sale (at fair value)	129,567	51,456
Government Sponsored Agencies [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Debt securities available for sale (at fair value)	0	0
Government Sponsored Agencies [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Debt securities available for sale (at fair value)	129,567	51,456
Government Sponsored Agencies [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Debt securities available for sale (at fair value)	0	0
Nongovernment Sponsored Agencies [Member]
Debt securities available for sale (at fair value)	73,869	61,617
Nongovernment Sponsored Agencies [Member] | Fair Value, Recurring [Member]
Debt securities available for sale (at fair value)	73,869	61,617
Nongovernment Sponsored Agencies [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Debt securities available for sale (at fair value)	0	0
Nongovernment Sponsored Agencies [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Debt securities available for sale (at fair value)	69,262	61,617
Nongovernment Sponsored Agencies [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Debt securities available for sale (at fair value)	4,607	0
US States and Political Subdivisions Debt Securities [Member] | Fair Value, Recurring [Member]
Debt securities available for sale (at fair value)	94,929	93,067
US States and Political Subdivisions Debt Securities [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Debt securities available for sale (at fair value)	0	0
US States and Political Subdivisions Debt Securities [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Debt securities available for sale (at fair value)	94,929	93,067
US States and Political Subdivisions Debt Securities [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Debt securities available for sale (at fair value)	0	0
Corporate Debt Securities [Member]
Debt securities available for sale (at fair value)	37,907	31,628
Corporate Debt Securities [Member] | Fair Value, Recurring [Member]
Debt securities available for sale (at fair value)	37,907	31,628
Corporate Debt Securities [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Debt securities available for sale (at fair value)	0	0
Corporate Debt Securities [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Debt securities available for sale (at fair value)	37,907	29,788
Corporate Debt Securities [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Debt securities available for sale (at fair value)	0	1,840
Asset-Backed Securities [Member]
Debt securities available for sale (at fair value)	44,205	19,476
Asset-Backed Securities [Member] | Fair Value, Recurring [Member]
Debt securities available for sale (at fair value)	44,205	19,476
Asset-Backed Securities [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Debt securities available for sale (at fair value)	0	0
Asset-Backed Securities [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Debt securities available for sale (at fair value)	44,205	19,476
Asset-Backed Securities [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Debt securities available for sale (at fair value)	0	0
Tax Exempt Debt Securities U.S. States And Political Subdivisions [Member] | Fair Value, Recurring [Member]
Debt securities available for sale (at fair value)	99,460	127,738
Tax Exempt Debt Securities U.S. States And Political Subdivisions [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Debt securities available for sale (at fair value)	0	0
Tax Exempt Debt Securities U.S. States And Political Subdivisions [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Debt securities available for sale (at fair value)	99,460	127,738
Tax Exempt Debt Securities U.S. States And Political Subdivisions [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Debt securities available for sale (at fair value)	0	0
Interest Rate Cap [Member] | Fair Value, Recurring [Member]
Derivative financial assets	24,314	30,601
Interest Rate Cap [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Derivative financial assets	0	0
Interest Rate Cap [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Derivative financial assets	24,314	30,601
Interest Rate Cap [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Derivative financial assets	0	0
Interest Rate Swap [Member] | Fair Value, Recurring [Member]
Derivative financial assets	8,831	9,905
Interest Rate Swap [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Derivative financial assets	0	0
Interest Rate Swap [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Derivative financial assets	8,831	9,905
Interest Rate Swap [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Derivative financial assets	$ 0	$ 0