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Note 9 - Subordinated Debt (Details Textual) - USD ($) $ in Thousands | Jun. 29, 2020 | Dec. 31, 2023 | Dec. 31, 2022 | Oct. 30, 2015
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Subordinated Loan Agreement Note [Member] |  |  |  |
Debt Instrument, Face Amount |  |  |  | $ 5,000
Debt Instrument, Interest Rate, Stated Percentage |  |  |  | 6.75%
Subordinated Term Note Due 2030 [Member] |  |  |  |
Debt Instrument, Face Amount | $ 5,000 |  |  |
Debt Instrument, Interest Rate, Stated Percentage | 5.50% |  |  |
Debt Issuance Costs, Net |  | $ 3 | $ 5 |
Subordinated Term Note Due 2030 [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] |  |  |  |
Debt Instrument, Basis Spread on Variable Rate | 5.10% |  |  |

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- Definition Face (par) amount of debt instrument at time of issuance. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 835 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482900/835-30-50-1 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1B -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481139/470-20-50-1B Reference 3: http://www.xbrl.org/2003/role/exampleRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 69B -Publisher FASB -URI https://asc.fasb.org//1943274/2147481568/470-20-55-69B Reference 4: http://www.xbrl.org/2003/role/exampleRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 69C -Publisher FASB -URI https://asc.fasb.org//1943274/2147481568/470-20-55-69C Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482925/835-30-45-2 Reference 6: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 55 -Paragraph 8 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482949/835-30-55-8 + Details
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