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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

X

- Definition

Fair value portion of impaired PCI loans receivables.

+ References

No definition available.

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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
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-Section 45
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- Definition

Fair value of contingent consideration in a business combination that is classified in shareholders' equity.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
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Fair value, after the effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets not subject to a master netting arrangement and not elected to be offset.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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-Topic 210
-SubTopic 20
-Section 55
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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