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Note 13 - Fair Value and Interest Rate Risk - Financial Assets Measured at Fair Value on a Recurring Basis (Details) - USD ($) $ in Thousands | Mar. 31, 2021 | Dec. 31, 2020
--- | --- | ---
Available-for-sale securities | $ 57,893 | $ 49,262
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member] |  |
Available-for-sale securities | 22,687 | 16,833
Corporate Debt Securities [Member] |  |
Available-for-sale securities | 17,333 | 17,290
Subordinated Notes [Member] |  |
Available-for-sale securities | 9,149 | 9,005
SBA Loan Pools [Member] |  |
Available-for-sale securities | 8,165 | 5,567
US States and Political Subdivisions Debt Securities [Member] |  |
Available-for-sale securities | 559 | 567
Fair Value, Recurring [Member] |  |
Available-for-sale securities | 57,893 | 49,262
Interest rate swap receivable | 791 | 1,187
Interest rate swap liability | 791 | 1,187
Fair Value, Recurring [Member] | Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member] |  |
Available-for-sale securities | 22,687 | 16,833
Fair Value, Recurring [Member] | Corporate Debt Securities [Member] |  |
Available-for-sale securities | 17,333 | 17,290
Fair Value, Recurring [Member] | Subordinated Notes [Member] |  |
Available-for-sale securities | 9,149 | 9,005
Fair Value, Recurring [Member] | SBA Loan Pools [Member] |  |
Available-for-sale securities | 8,165 | 5,567
Fair Value, Recurring [Member] | US States and Political Subdivisions Debt Securities [Member] |  |
Available-for-sale securities | 559 | 567
Fair Value, Inputs, Level 1 [Member] | Fair Value, Recurring [Member] |  |
Available-for-sale securities |  |
Interest rate swap receivable |  |
Interest rate swap liability |  |
Fair Value, Inputs, Level 1 [Member] | Fair Value, Recurring [Member] | Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member] |  |
Available-for-sale securities |  |
Fair Value, Inputs, Level 1 [Member] | Fair Value, Recurring [Member] | Corporate Debt Securities [Member] |  |
Available-for-sale securities |  |
Fair Value, Inputs, Level 1 [Member] | Fair Value, Recurring [Member] | Subordinated Notes [Member] |  |
Available-for-sale securities |  |
Fair Value, Inputs, Level 1 [Member] | Fair Value, Recurring [Member] | SBA Loan Pools [Member] |  |
Available-for-sale securities |  |
Fair Value, Inputs, Level 1 [Member] | Fair Value, Recurring [Member] | US States and Political Subdivisions Debt Securities [Member] |  |
Available-for-sale securities |  |
Fair Value, Inputs, Level 2 [Member] | Fair Value, Recurring [Member] |  |
Available-for-sale securities | 57,893 | 49,262
Interest rate swap receivable | 791 | 1,187
Interest rate swap liability | 791 | 1,187
Fair Value, Inputs, Level 2 [Member] | Fair Value, Recurring [Member] | Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member] |  |
Available-for-sale securities | 22,687 | 16,833
Fair Value, Inputs, Level 2 [Member] | Fair Value, Recurring [Member] | Corporate Debt Securities [Member] |  |
Available-for-sale securities | 17,333 | 17,290
Fair Value, Inputs, Level 2 [Member] | Fair Value, Recurring [Member] | Subordinated Notes [Member] |  |
Available-for-sale securities | 9,149 | 9,005
Fair Value, Inputs, Level 2 [Member] | Fair Value, Recurring [Member] | SBA Loan Pools [Member] |  |
Available-for-sale securities | 8,165 | 5,567
Fair Value, Inputs, Level 2 [Member] | Fair Value, Recurring [Member] | US States and Political Subdivisions Debt Securities [Member] |  |
Available-for-sale securities | 559 | 567
Fair Value, Inputs, Level 3 [Member] | Fair Value, Recurring [Member] |  |
Available-for-sale securities |  |
Interest rate swap receivable |  |
Interest rate swap liability |  |
Fair Value, Inputs, Level 3 [Member] | Fair Value, Recurring [Member] | Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member] |  |
Available-for-sale securities |  |
Fair Value, Inputs, Level 3 [Member] | Fair Value, Recurring [Member] | Corporate Debt Securities [Member] |  |
Available-for-sale securities |  |
Fair Value, Inputs, Level 3 [Member] | Fair Value, Recurring [Member] | Subordinated Notes [Member] |  |
Available-for-sale securities |  |
Fair Value, Inputs, Level 3 [Member] | Fair Value, Recurring [Member] | SBA Loan Pools [Member] |  |
Available-for-sale securities |  |
Fair Value, Inputs, Level 3 [Member] | Fair Value, Recurring [Member] | US States and Political Subdivisions Debt Securities [Member] |  |
Available-for-sale securities |  |

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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 -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(6)) -URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 30 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=121558606&loc=SL82898722-210454 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121553693&loc=d3e26610-111562 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (aa) -URI http://asc.fasb.org/extlink&oid=121645371&loc=d3e27161-111563 + Details
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