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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 | Sep. 30, 2020 | Mar. 31, 2020 | Dec. 31, 2019
--- | --- | --- | ---
Available-for-sale securities | $ 47,823 |  | $ 48,317
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member] |  |  |
Available-for-sale securities | 15,705 |  | 16,685
Corporate Debt Securities [Member] |  |  |
Available-for-sale securities | 17,250 |  | 17,313
Subordinated Notes [Member] |  |  |
Available-for-sale securities | 9,013 |  | 9,204
SBA Loan Pools [Member] |  |  |
Available-for-sale securities | 5,301 |  | 5,115
US States and Political Subdivisions Debt Securities [Member] |  |  |
Available-for-sale securities | 554 |  |
Fair Value, Recurring [Member] |  |  |
Available-for-sale securities | 47,823 |  | 48,317
Contingent consideration liability | 86 |  | 86
Interest rate swap receivable | 1,303 |  | 694
Interest rate swap liability | 1,303 |  | 694
Impaired PCI Loans, net |  | $ 176 |
Fair Value, Recurring [Member] | Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member] |  |  |
Available-for-sale securities | 15,705 |  | 16,685
Fair Value, Recurring [Member] | Corporate Debt Securities [Member] |  |  |
Available-for-sale securities | 17,250 |  | 17,313
Fair Value, Recurring [Member] | Subordinated Notes [Member] |  |  |
Available-for-sale securities | 9,013 |  | 9,204
Fair Value, Recurring [Member] | SBA Loan Pools [Member] |  |  |
Available-for-sale securities | 5,301 |  | 5,115
Fair Value, Recurring [Member] | US States and Political Subdivisions Debt Securities [Member] |  |  |
Available-for-sale securities | 554 |  |
Fair Value, Inputs, Level 1 [Member] | Fair Value, Recurring [Member] |  |  |
Available-for-sale securities |  |  |
Contingent consideration liability |  |  |
Interest rate swap receivable |  |  |
Interest rate swap liability |  |  |
Impaired PCI Loans, net |  |  |
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 | 47,823 |  | 48,317
Contingent consideration liability |  |  |
Interest rate swap receivable | 1,303 |  | 694
Interest rate swap liability | 1,303 |  | 694
Impaired PCI Loans, net |  |  |
Fair Value, Inputs, Level 2 [Member] | Fair Value, Recurring [Member] | Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member] |  |  |
Available-for-sale securities | 15,705 |  | 16,685
Fair Value, Inputs, Level 2 [Member] | Fair Value, Recurring [Member] | Corporate Debt Securities [Member] |  |  |
Available-for-sale securities | 17,250 |  | 17,313
Fair Value, Inputs, Level 2 [Member] | Fair Value, Recurring [Member] | Subordinated Notes [Member] |  |  |
Available-for-sale securities | 9,013 |  | 9,204
Fair Value, Inputs, Level 2 [Member] | Fair Value, Recurring [Member] | SBA Loan Pools [Member] |  |  |
Available-for-sale securities | 5,301 |  | 5,115
Fair Value, Inputs, Level 2 [Member] | Fair Value, Recurring [Member] | US States and Political Subdivisions Debt Securities [Member] |  |  |
Available-for-sale securities | 554 |  |
Fair Value, Inputs, Level 3 [Member] | Fair Value, Recurring [Member] |  |  |
Available-for-sale securities |  |  |
Contingent consideration liability | 86 |  | 86
Interest rate swap receivable |  |  |
Interest rate swap liability |  |  |
Impaired PCI Loans, net |  | $ 176 |
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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