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Note 10 - Intangible Assets - Intangible Assets (Details) - USD ($) $ in Thousands | Mar. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Intangible asset, gross amount | $ 6,946 | $ 6,946
Intangible asset, accumulated amortization | 3,204 | 2,987
Core Deposits [Member] |  |
Intangible asset, gross amount | 6,411 | 6,411
Intangible asset, accumulated amortization | 2,943 | 2,745
Customer Lists [Member] |  |
Intangible asset, gross amount | 535 | 535
Intangible asset, accumulated amortization | $ 261 | $ 242

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- Definition Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 928 -SubTopic 340 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6473545&loc=d3e61844-108004 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
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