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Note 16 - Fair Value - Assets and Liabilities Measured at Fair Value on Recurring Basis (Details) - USD ($) $ in Thousands | Dec. 31, 2023 | Dec. 31, 2022 | Jan. 01, 2021 | [1]
--- | --- | --- | --- | ---
Securities available for sale | $ 280,961 | $ 300,349 | $ 83,358
Derivative assets | 136 | 199 |
Fair Value, Recurring [Member] |  |  |
Securities available for sale | 280,961 | 300,349 |
Equity securities | 55 | 55 |
Fair value loans | 3,421 | 3,784 |
Derivative assets | 136 | 199 |
Deferred compensation assets | 6,729 | 5,142 |
Deferred compensation liabilities | 8,282 | 5,142 |
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] |  |  |
Securities available for sale | 0 | 0 |
Equity securities | 0 | 0 |
Fair value loans | 0 | 0 |
Derivative assets | 0 | 0 |
Deferred compensation assets | 6,729 | 5,142 |
Deferred compensation liabilities | 8,282 | 5,142 |
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] |  |  |
Securities available for sale | 280,961 | 300,349 |
Equity securities | 55 | 55 |
Fair value loans | 0 | 0 |
Derivative assets | 136 | 199 |
Deferred compensation assets | 0 | 0 |
Deferred compensation liabilities | 0 | 0 |
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |
Securities available for sale | 0 | 0 |
Equity securities | 0 | 0 |
Fair value loans | 3,421 | 3,784 |
Derivative assets | 0 | 0 |
Deferred compensation assets | 0 | 0 |
Deferred compensation liabilities | 0 | 0 |
Fair Value, Recurring [Member] | US Government Agencies Debt Securities [Member] |  |  |
Securities available for sale | 5,749 | 1,485 |
Fair Value, Recurring [Member] | US Government Agencies Debt Securities [Member] | Fair Value, Inputs, Level 1 [Member] |  |  |
Securities available for sale | 0 | 0 |
Fair Value, Recurring [Member] | US Government Agencies Debt Securities [Member] | Fair Value, Inputs, Level 2 [Member] |  |  |
Securities available for sale | 5,749 | 1,485 |
Fair Value, Recurring [Member] | US Government Agencies Debt Securities [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |
Securities available for sale | 0 | 0 |
Fair Value, Recurring [Member] | US Treasury Securities [Member] |  |  |
Securities available for sale | 145,826 | 157,264 |
Fair Value, Recurring [Member] | US Treasury Securities [Member] | Fair Value, Inputs, Level 1 [Member] |  |  |
Securities available for sale | 0 | 0 |
Fair Value, Recurring [Member] | US Treasury Securities [Member] | Fair Value, Inputs, Level 2 [Member] |  |  |
Securities available for sale | 145,826 | 157,264 |
Fair Value, Recurring [Member] | US Treasury Securities [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |
Securities available for sale | 0 | 0 |
Fair Value, Recurring [Member] | US States and Political Subdivisions Debt Securities [Member] |  |  |
Securities available for sale | 19,377 | 23,309 |
Fair Value, Recurring [Member] | US States and Political Subdivisions Debt Securities [Member] | Fair Value, Inputs, Level 1 [Member] |  |  |
Securities available for sale | 0 | 0 |
Fair Value, Recurring [Member] | US States and Political Subdivisions Debt Securities [Member] | Fair Value, Inputs, Level 2 [Member] |  |  |
Securities available for sale | 19,377 | 23,309 |
Fair Value, Recurring [Member] | US States and Political Subdivisions Debt Securities [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |
Securities available for sale | 0 | 0 |
Fair Value, Recurring [Member] | Corporate Debt Securities [Member] |  |  |
Securities available for sale | 27,081 | 34,857 |
Fair Value, Recurring [Member] | Corporate Debt Securities [Member] | Fair Value, Inputs, Level 1 [Member] |  |  |
Securities available for sale | 0 | 0 |
Fair Value, Recurring [Member] | Corporate Debt Securities [Member] | Fair Value, Inputs, Level 2 [Member] |  |  |
Securities available for sale | 27,081 | 34,857 |
Fair Value, Recurring [Member] | Corporate Debt Securities [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |
Securities available for sale | 0 | 0 |
Fair Value, Recurring [Member] | Mortgage-backed Agency Securities [Member] |  |  |
Securities available for sale | 82,928 | 83,434 |
Fair Value, Recurring [Member] | Mortgage-backed Agency Securities [Member] | Fair Value, Inputs, Level 1 [Member] |  |  |
Securities available for sale | 0 | 0 |
Fair Value, Recurring [Member] | Mortgage-backed Agency Securities [Member] | Fair Value, Inputs, Level 2 [Member] |  |  |
Securities available for sale | 82,928 | 83,434 |
Fair Value, Recurring [Member] | Mortgage-backed Agency Securities [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |
Securities available for sale | $ 0 | $ 0 |
[1] | Per our analysis no ACL was necessary for investment securities available for sale.

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- Definition Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (aa) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481800/320-10-50-2 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481830/320-10-45-1 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 942 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(6)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479853/942-210-S99-1 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 30 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479130/326-30-45-1 + Details
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- Definition Fair value, after the effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. 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