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Note 16 - Fair Value Measurements - Valuation of Assets at Fair Value Input Levels (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Equity securities with a readily determinable fair value, at fair value	$ 1,388	$ 1,336
Debt securities, available-for-sale, at fair value	262,622	276,601
Equity Securities [Member]
Equity securities with a readily determinable fair value, at fair value	94	96
US Treasury Securities [Member]
Debt securities, available-for-sale, at fair value	65,572	68,202
US Government Corporations and Agencies Securities [Member]
Debt securities, available-for-sale, at fair value	83,308	80,901
Corporate Debt Securities [Member]
Debt securities, available-for-sale, at fair value	6,862	6,534
Mortgage-Backed Security, Issued by US Government-Sponsored Enterprise [Member]
Debt securities, available-for-sale, at fair value	68,339	72,790
Nontaxable Municipal Bonds [Member]
Debt securities, available-for-sale, at fair value	4,374	7,171
Taxable Municipal Bonds [Member]
Debt securities, available-for-sale, at fair value	34,167	41,003
Fair Value, Recurring [Member]
Debt securities, available-for-sale, at fair value	264,010	277,937
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Debt securities, available-for-sale, at fair value	66,960	69,538
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Debt securities, available-for-sale, at fair value	197,050	208,399
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Debt securities, available-for-sale, at fair value	0	0
Fair Value, Recurring [Member] | Equity Securities [Member]
Equity securities with a readily determinable fair value, at fair value	94	96
Fair Value, Recurring [Member] | Equity Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Equity securities with a readily determinable fair value, at fair value	94	96
Fair Value, Recurring [Member] | Equity Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Equity securities with a readily determinable fair value, at fair value	0	0
Fair Value, Recurring [Member] | Equity Securities [Member] | Fair Value, Inputs, Level 3 [Member]
Equity securities with a readily determinable fair value, at fair value	0	0
Fair Value, Recurring [Member] | Mutual Funds Measured At Net Asset Value [Member]
Equity securities with a readily determinable fair value, at fair value	1,294	1,240
Fair Value, Recurring [Member] | Mutual Funds Measured At Net Asset Value [Member] | Fair Value, Inputs, Level 1 [Member]
Equity securities with a readily determinable fair value, at fair value	1,294	1,240
Fair Value, Recurring [Member] | Mutual Funds Measured At Net Asset Value [Member] | Fair Value, Inputs, Level 2 [Member]
Equity securities with a readily determinable fair value, at fair value	0	0
Fair Value, Recurring [Member] | Mutual Funds Measured At Net Asset Value [Member] | Fair Value, Inputs, Level 3 [Member]
Equity securities with a readily determinable fair value, at fair value	0	0
Fair Value, Recurring [Member] | US Treasury Securities [Member]
Debt securities, available-for-sale, at fair value	65,572	68,202
Fair Value, Recurring [Member] | US Treasury Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Debt securities, available-for-sale, at fair value	65,572	68,202
Fair Value, Recurring [Member] | US Treasury Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Debt securities, available-for-sale, at fair value	0	0
Fair Value, Recurring [Member] | US Treasury Securities [Member] | Fair Value, Inputs, Level 3 [Member]
Debt securities, available-for-sale, at fair value	0	0
Fair Value, Recurring [Member] | US Government Corporations and Agencies Securities [Member]
Debt securities, available-for-sale, at fair value	83,308	80,901
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	83,308	80,901
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] | Corporate Debt Securities [Member]
Debt securities, available-for-sale, at fair value	6,862	6,534
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	6,862	6,534
Fair Value, Recurring [Member] | Corporate Debt Securities [Member] | Fair Value, Inputs, Level 3 [Member]
Debt securities, available-for-sale, at fair value	0	0
Fair Value, Recurring [Member] | Mortgage-Backed Security, Issued by US Government-Sponsored Enterprise [Member]
Debt securities, available-for-sale, at fair value	68,339	72,790
Fair Value, Recurring [Member] | Mortgage-Backed Security, Issued by US Government-Sponsored Enterprise [Member] | Fair Value, Inputs, Level 1 [Member]
Debt securities, available-for-sale, at fair value	0	0
Fair Value, Recurring [Member] | Mortgage-Backed Security, Issued by US Government-Sponsored Enterprise [Member] | Fair Value, Inputs, Level 2 [Member]
Debt securities, available-for-sale, at fair value	68,339	72,790
Fair Value, Recurring [Member] | Mortgage-Backed Security, Issued by US Government-Sponsored Enterprise [Member] | Fair Value, Inputs, Level 3 [Member]
Debt securities, available-for-sale, at fair value	0	0
Fair Value, Recurring [Member] | Nontaxable Municipal Bonds [Member]
Debt securities, available-for-sale, at fair value	4,374	7,171
Fair Value, Recurring [Member] | Nontaxable Municipal Bonds [Member] | Fair Value, Inputs, Level 1 [Member]
Debt securities, available-for-sale, at fair value	0	0
Fair Value, Recurring [Member] | Nontaxable Municipal Bonds [Member] | Fair Value, Inputs, Level 2 [Member]
Debt securities, available-for-sale, at fair value	4,374	7,171
Fair Value, Recurring [Member] | Nontaxable Municipal Bonds [Member] | Fair Value, Inputs, Level 3 [Member]
Debt securities, available-for-sale, at fair value	0	0
Fair Value, Recurring [Member] | Taxable Municipal Bonds [Member]
Debt securities, available-for-sale, at fair value	34,167	41,003
Fair Value, Recurring [Member] | Taxable Municipal Bonds [Member] | Fair Value, Inputs, Level 1 [Member]
Debt securities, available-for-sale, at fair value	0	0
Fair Value, Recurring [Member] | Taxable Municipal Bonds [Member] | Fair Value, Inputs, Level 2 [Member]
Debt securities, available-for-sale, at fair value	34,167	41,003
Fair Value, Recurring [Member] | Taxable Municipal Bonds [Member] | Fair Value, Inputs, Level 3 [Member]
Debt securities, available-for-sale, at fair value	0	0
Fair Value, Nonrecurring [Member]
Individually evaluated collateral dependent loans	1,678	0
Total nonrecurring fair value measurements	1,678	0
Fair Value, Nonrecurring [Member] | Fair Value, Inputs, Level 1 [Member]
Individually evaluated collateral dependent loans	0	0
Total nonrecurring fair value measurements	0	0
Fair Value, Nonrecurring [Member] | Fair Value, Inputs, Level 2 [Member]
Individually evaluated collateral dependent loans	0	0
Total nonrecurring fair value measurements	0	0
Fair Value, Nonrecurring [Member] | Fair Value, Inputs, Level 3 [Member]
Individually evaluated collateral dependent loans	1,678	0
Total nonrecurring fair value measurements	$ 1,678	$ 0

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