Note 4 - Fair Value Measurements - Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Debt securities available for sale (at fair value)	$ 405,201	$ 401,103
Equity investments (at fair value)	29,494	20,609
US Government Corporations and Agencies Securities [Member]
Debt securities available for sale (at fair value)	20,219	36,629
Government Sponsored Agencies [Member]
Debt securities available for sale (at fair value)	51,456	62,211
Nongovernment Sponsored Agencies [Member]
Debt securities available for sale (at fair value)	61,617	26,586
Corporate Debt Securities [Member]
Debt securities available for sale (at fair value)	31,628	30,278
Asset-Backed Securities [Member]
Debt securities available for sale (at fair value)	19,476	24,883
Fair Value, Recurring [Member]
Debt securities available for sale (at fair value)	405,201	401,103
Equity investments (at fair value)	29,494	20,609
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)	25,766	20,202
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Debt securities available for sale (at fair value)	403,361	401,103
Equity investments (at fair value)	3,728	407
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Debt securities available for sale (at fair value)	1,840	0
Equity investments (at fair value)	0	0
Fair Value, Recurring [Member] | US Government Corporations and Agencies Securities [Member]
Debt securities available for sale (at fair value)	20,219	36,629
Fair Value, Recurring [Member] | US Government Corporations and Agencies Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Debt securities available for sale (at fair value)	0	0
Fair Value, Recurring [Member] | US Government Corporations and Agencies Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Debt securities available for sale (at fair value)	20,219	36,629
Fair Value, Recurring [Member] | US Government Corporations and Agencies Securities [Member] | Fair Value, Inputs, Level 3 [Member]
Debt securities available for sale (at fair value)	0	0
Fair Value, Recurring [Member] | Government Sponsored Agencies [Member]
Debt securities available for sale (at fair value)	51,456	62,211
Fair Value, Recurring [Member] | Government Sponsored Agencies [Member] | Fair Value, Inputs, Level 1 [Member]
Debt securities available for sale (at fair value)	0	0
Fair Value, Recurring [Member] | Government Sponsored Agencies [Member] | Fair Value, Inputs, Level 2 [Member]
Debt securities available for sale (at fair value)	51,456	62,211
Fair Value, Recurring [Member] | Government Sponsored Agencies [Member] | Fair Value, Inputs, Level 3 [Member]
Debt securities available for sale (at fair value)	0	0
Fair Value, Recurring [Member] | Nongovernment Sponsored Agencies [Member]
Debt securities available for sale (at fair value)	61,617	26,586
Fair Value, Recurring [Member] | Nongovernment Sponsored Agencies [Member] | Fair Value, Inputs, Level 1 [Member]
Debt securities available for sale (at fair value)	0	0
Fair Value, Recurring [Member] | Nongovernment Sponsored Agencies [Member] | Fair Value, Inputs, Level 2 [Member]
Debt securities available for sale (at fair value)	61,617	26,586
Fair Value, Recurring [Member] | Nongovernment Sponsored Agencies [Member] | Fair Value, Inputs, Level 3 [Member]
Debt securities available for sale (at fair value)	0	0
Fair Value, Recurring [Member] | US States and Political Subdivisions Debt Securities [Member]
Debt securities available for sale (at fair value)	93,067	137,786
Fair Value, Recurring [Member] | US States and Political Subdivisions Debt Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Debt securities available for sale (at fair value)	0	0
Fair Value, Recurring [Member] | US States and Political Subdivisions Debt Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Debt securities available for sale (at fair value)	93,067	137,786
Fair Value, Recurring [Member] | US States and Political Subdivisions Debt Securities [Member] | Fair Value, Inputs, Level 3 [Member]
Debt securities available for sale (at fair value)	0	0
Fair Value, Recurring [Member] | Corporate Debt Securities [Member]
Debt securities available for sale (at fair value)	31,628	30,278
Fair Value, Recurring [Member] | Corporate Debt Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Debt securities available for sale (at fair value)	0	0
Fair Value, Recurring [Member] | Corporate Debt Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Debt securities available for sale (at fair value)	29,788	30,278
Fair Value, Recurring [Member] | Corporate Debt Securities [Member] | Fair Value, Inputs, Level 3 [Member]
Debt securities available for sale (at fair value)	1,840	0
Fair Value, Recurring [Member] | Asset-Backed Securities [Member]
Debt securities available for sale (at fair value)	19,476	24,883
Fair Value, Recurring [Member] | Asset-Backed Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Debt securities available for sale (at fair value)	0	0
Fair Value, Recurring [Member] | Asset-Backed Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Debt securities available for sale (at fair value)	19,476	24,883
Fair Value, Recurring [Member] | Asset-Backed Securities [Member] | Fair Value, Inputs, Level 3 [Member]
Debt securities available for sale (at fair value)	0	0
Fair Value, Recurring [Member] | Tax Exempt Debt Securities U.S. States And Political Subdivisions [Member]
Debt securities available for sale (at fair value)	127,738	82,730
Fair Value, Recurring [Member] | Tax Exempt Debt Securities U.S. States And Political Subdivisions [Member] | Fair Value, Inputs, Level 1 [Member]
Debt securities available for sale (at fair value)	0	0
Fair Value, Recurring [Member] | Tax Exempt Debt Securities U.S. States And Political Subdivisions [Member] | Fair Value, Inputs, Level 2 [Member]
Debt securities available for sale (at fair value)	127,738	82,730
Fair Value, Recurring [Member] | Tax Exempt Debt Securities U.S. States And Political Subdivisions [Member] | Fair Value, Inputs, Level 3 [Member]
Debt securities available for sale (at fair value)	0	0
Fair Value, Recurring [Member] | Interest Rate Cap [Member]
Interest rate caps	30,601	11,187
Fair Value, Recurring [Member] | Interest Rate Cap [Member] | Fair Value, Inputs, Level 1 [Member]
Interest rate caps	0	0
Fair Value, Recurring [Member] | Interest Rate Cap [Member] | Fair Value, Inputs, Level 2 [Member]
Interest rate caps	30,601	11,187
Fair Value, Recurring [Member] | Interest Rate Cap [Member] | Fair Value, Inputs, Level 3 [Member]
Interest rate caps	0	0
Fair Value, Recurring [Member] | Interest Rate Swap [Member]
Interest rate swaps	9,905	1,124
Fair Value, Recurring [Member] | Interest Rate Swap [Member] | Fair Value, Inputs, Level 1 [Member]
Interest rate swaps	0	0
Fair Value, Recurring [Member] | Interest Rate Swap [Member] | Fair Value, Inputs, Level 2 [Member]
Interest rate swaps	9,905	1,124
Fair Value, Recurring [Member] | Interest Rate Swap [Member] | Fair Value, Inputs, Level 3 [Member]
Interest rate swaps	$ 0	$ 0