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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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