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Note 4 - Allowance for Credit Losses - Modified Financing Receivable (Details) - USD ($) $ in Thousands | 3 Months Ended |  |
--- | --- | --- | ---
Mar. 31, 2023 | Dec. 31, 2022 | Mar. 31, 2022
Amortized cost basis |  | $ 101 | $ 1,600
Extended Maturity [Member] |  |  |
Amortized cost basis | $ 76 |  |
to Total Financing Receivables, Percentage | 0.02% |  |
Principal Forgiveness [Member] |  |  |
Amortized cost basis | $ 20 |  |
to Total Financing Receivables, Percentage | 0.01% |  |
Real Estate 1 [Member] | Construction and Land Development [Member] | Extended Maturity [Member] |  |  |
Amortized cost basis | $ 0 |  |
to Total Financing Receivables, Percentage | 0.00% |  |
Real Estate 1 [Member] | Construction and Land Development [Member] | Principal Forgiveness [Member] |  |  |
Amortized cost basis | $ 0 |  |
to Total Financing Receivables, Percentage | 0.00% |  |
Real Estate 1 [Member] | Secured by Multi-family Residential Properties [Member] | Extended Maturity [Member] |  |  |
Amortized cost basis | $ 76 |  |
to Total Financing Receivables, Percentage | 0.02% |  |
term effect (Year) | 15 years |  |
Real Estate 1 [Member] | Secured by Multi-family Residential Properties [Member] | Principal Forgiveness [Member] |  |  |
Amortized cost basis | $ 20 |  |
to Total Financing Receivables, Percentage | 0.01% |  |
financial effect | $ 29 |  |
Real Estate 1 [Member] | Other Real Estate Loans [Member] | Extended Maturity [Member] |  |  |
Amortized cost basis | $ 0 |  |
to Total Financing Receivables, Percentage | 0.00% |  |
Real Estate 1 [Member] | Other Real Estate Loans [Member] | Principal Forgiveness [Member] |  |  |
Amortized cost basis | $ 0 |  |
to Total Financing Receivables, Percentage | 0.00% |  |
Commercial and Industrial Loans [Member] | Extended Maturity [Member] |  |  |
Amortized cost basis | $ 0 |  |
to Total Financing Receivables, Percentage | 0.00% |  |
Commercial and Industrial Loans [Member] | Principal Forgiveness [Member] |  |  |
Amortized cost basis | $ 0 |  |
to Total Financing Receivables, Percentage | 0.00% |  |

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- Definition Percentage of financing receivable modified during period for debtor experiencing financial difficulty to total financing receivables. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 310 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 42 -Subparagraph (a)(1) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481962/310-10-50-42 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Topic 310 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 12A -Publisher FASB -URI https://asc.fasb.org//1943274/2147481933/310-10-55-12A + Details
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- Definition Accumulated amortized cost of financing receivable modified for debtor experiencing financial difficulty. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 310 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 42 -Subparagraph (a)(1) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481962/310-10-50-42 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 310 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 33 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481962/310-10-50-33 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 310 -SubTopic 40 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481746/310-40-50-4 + Details
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