Note 3 - Fair Value Measurements - Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Debt securities available for sale (at fair value)	$ 383,965	$ 401,103	[1]
Fair Value, Recurring [Member]
Debt securities available for sale (at fair value)	383,965	401,103
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Debt securities available for sale (at fair value)	0	0
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Debt securities available for sale (at fair value)	380,285	401,103
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Debt securities available for sale (at fair value)	3,680	0
US Government Corporations and Agencies Securities [Member]
Debt securities available for sale (at fair value)	21,659	36,629
US Government Corporations and Agencies Securities [Member] | Fair Value, Recurring [Member]
Debt securities available for sale (at fair value)	21,659	36,629
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)	21,659	36,629
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)	52,004	62,211
Government Sponsored Agencies [Member] | Fair Value, Recurring [Member]
Debt securities available for sale (at fair value)	52,004	62,211
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)	52,004	62,211
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)	48,680	26,586
Nongovernment Sponsored Agencies [Member] | Fair Value, Recurring [Member]
Debt securities available for sale (at fair value)	48,680	26,586
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)	48,680	26,586
Nongovernment Sponsored Agencies [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Debt securities available for sale (at fair value)	0	0
US States and Political Subdivisions Debt Securities [Member] | Fair Value, Recurring [Member]
Debt securities available for sale (at fair value)	94,001	137,786
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)	94,001	137,786
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)	31,111	30,278
Corporate Debt Securities [Member] | Fair Value, Recurring [Member]
Debt securities available for sale (at fair value)	31,111	30,278
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)	27,431	30,278
Corporate Debt Securities [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Debt securities available for sale (at fair value)	3,680	0
Asset-Backed Securities [Member]
Debt securities available for sale (at fair value)	22,401	24,883
Asset-Backed Securities [Member] | Fair Value, Recurring [Member]
Debt securities available for sale (at fair value)	22,401	24,883
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)	22,401	24,883
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)	114,109	82,730
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)	114,109	82,730
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]
Interest rate caps	31,659	11,187
Interest Rate Cap [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Interest rate caps	0	0
Interest Rate Cap [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Interest rate caps	31,659	11,187
Interest Rate Cap [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Interest rate caps	0	0
Interest Rate Swap [Member] | Fair Value, Recurring [Member]
Interest rate swaps	10,520	1,124
Interest Rate Swap [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Interest rate swaps	0	0
Interest Rate Swap [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Interest rate swaps	10,520	1,124
Interest Rate Swap [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Interest rate swaps	$ 0	$ 0

[1] Derived from audited consolidated financial statements