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Note 3 - Debt Securities (Details Textual) $ in Thousands | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2020 USD ($) | Dec. 31, 2022 USD ($) | Dec. 31, 2021 USD ($)
Number of Securities in Unrealized Loss Position |  | 113 | 23
Percentage of Combined Depreciation of Combined Reported Value of Aggregate Securities Portfolio |  | 6.59% | 0.91%
Debt Securities, Available-for-Sale, Realized Gain | $ 419 |  |
Debt Securities, Available-for-Sale, Realized Loss | $ 34 |  |
Debt Securities, Available-for-Sale, Amortized Cost, Total |  | $ 320,123 | $ 76,273
US Government Agencies Debt Securities [Member] |  |  |
Debt Securities, Available-for-Sale, Amortized Cost, Total |  | 1,500 | 469
US Treasury Securities [Member] |  |  |
Debt Securities, Available-for-Sale, Amortized Cost, Total |  | 161,617 |
US States and Political Subdivisions Debt Securities [Member] |  |  |
Debt Securities, Available-for-Sale, Amortized Cost, Total |  | 23,480 | 28,596
Corporate Debt Securities [Member] |  |  |
Debt Securities, Available-for-Sale, Amortized Cost, Total |  | 37,046 | 9,935
Mortgage-backed Agency Securities [Member] |  |  |
Debt Securities, Available-for-Sale, Amortized Cost, Total |  | 96,480 | 37,273
Asset Pledged as Collateral [Member] |  |  |
Debt Securities, Available-for-Sale, Amortized Cost, Total |  | $ 22,430 | $ 22,150

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- Definition Amortized cost 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 -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=126970911&loc=d3e27161-111563 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 30 -Section 45 -Paragraph 1 -URI https://asc.fasb.org/extlink&oid=124258926&loc=SL82898722-210454 + Details
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