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Note 8 - Fair Value Measurements (Details Textual) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2022 USD ($) | Mar. 31, 2021 USD ($) | Dec. 31, 2021
Provision for Loan and Lease Losses | $ 175,000 | $ 75,000 |
Number of Foreclosed Real Estate Properties | 0 |  |
Impaired Loan [Member] |  |  |
Provision for Loan and Lease Losses | $ (1,000) | 9,000 |
Foreclosed Real Estate [Member] |  |  |
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Write-down or Reserve, Amount | $ 0 | $ 0 |
Fair Value, Inputs, Level 3 [Member] | Impaired Loan [Member] |  |  |
Fair Value Inputs, Estimated Selling Costs |  |  | 10.00%
Fair Value, Inputs, Level 3 [Member] | Impaired Loan [Member] | Minimum [Member] |  |  |
Fair Value Inputs, Estimated Selling Costs | 10.00% |  |
Fair Value, Inputs, Level 3 [Member] | Impaired Loan [Member] | Maximum [Member] |  |  |
Fair Value Inputs, Estimated Selling Costs | 23.00% |  |
Fair Value, Inputs, Level 3 [Member] | Impaired Loan [Member] | Weighted Average [Member] |  |  |
Fair Value Inputs, Estimated Selling Costs | 11.00% |  |
Fair Value, Inputs, Level 3 [Member] | Foreclosed Real Estate [Member] |  |  |
Fair Value Inputs, Estimated Selling Costs | 65.00% |  |

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- Definition Amount of expense related to estimated loss from loan and lease transactions. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=126954810&loc=d3e3602-108585 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 220 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04.11) -URI https://asc.fasb.org/extlink&oid=120399700&loc=SL114874048-224260 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(2) -URI https://asc.fasb.org/extlink&oid=123577603&loc=SL6953423-111524 + Details
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- Definition Amount of write-down or reserve recognized in the income statement on real estate investments for entities with a substantial portion of business acquiring and holding investment real estate. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 970 -SubTopic 360 -Section S99 -Paragraph 1 -Subparagraph (SX 210.12-28(Footnote 5)) -URI https://asc.fasb.org/extlink&oid=120402810&loc=d3e638233-123024 + Details
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