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Note 8 - Components of Accumulated Other Comprehensive Income (Loss) - Components of Accumulated Other Comprehensive Income (Loss) (Details) (Parentheticals) - USD ($) $ in Thousands | 6 Months Ended
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Jun. 30, 2020 | Jun. 30, 2019
AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-sale, Parent [Member] |  |
Unrealized holding gain (loss) on available for sale securities, tax | $ 2,526 | $ 2,003
Reclassification adjustment for gain included in net income, taxes | (17) | (4)
Reclassification adjustment for gain included in net income, taxes | (17) | (4)
AOCI Attributable to Parent [Member] |  |
Unrealized holding gain (loss) on available for sale securities, tax | 2,526 | 2,003
Reclassification adjustment for gain included in net income, taxes | (17) | (4)
Reclassification adjustment for gain included in net income, taxes | $ (17) | $ (4)

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- Definition Amount of tax expense (benefit) of reclassification adjustment from accumulated other comprehensive income (loss). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=121641772&loc=d3e640-108580 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 17A -URI http://asc.fasb.org/extlink&oid=121641772&loc=SL34724391-108580 + Details
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