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Note 14 - Federal and State Income Taxes (Details) - USD ($) $ in Thousands |  | 12 Months Ended
--- | --- | ---
Jan. 01, 2020 | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Unrecognized tax benefits that would impact effective tax rate |  | $ 1,700 |  |
Unrecognized tax benefits, interest on income taxes accrued |  | $ 236 | $ 277 |
Increase in capitalized costs | $ 88,000 |  |  |
Increase in the deferred tax asset for premises and equipment | $ 22,200 |  |  |
Effective income tax rate |  | 21.00% | 21.00% | 21.00%
Domestic Tax Authority [Member] |  |  |  |
Deferred tax assets, operating loss carryforwards, subject to expiration |  | $ 4,800 |  |
Additional deferred tax assets, operating loss carryforwards, subject to expiration |  | 1,800 |  |
Domestic Tax Authority [Member] | Community National And CNB [Member] |  |  |  |
Deferred tax assets, operating loss carryforwards, subject to expiration |  | 3,000 |  |
State and Local Jurisdiction [Member] |  |  |  |
Deferred tax assets, operating loss carryforwards, subject to expiration |  | 10,900 |  |
Additional deferred tax assets, operating loss carryforwards, subject to expiration |  | 8,800 |  |
State and Local Jurisdiction [Member] | Community National And CNB [Member] |  |  |  |
Deferred tax assets, operating loss carryforwards, subject to expiration |  | $ 2,100 |  |

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- Definition Amount of increase (decrease) in deferred tax asset attributable to deductible temporary differences from property, plant, and equipment. + References No definition available. + Details
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- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible operating loss carryforwards that are subject to expiration dates. + References No definition available. + Details
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- Definition Percentage of domestic federal statutory tax rate applicable to pretax income (loss). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 6.I.Fact.4) -URI http://asc.fasb.org/extlink&oid=122134291&loc=d3e330036-122817 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08(h)(2)) -URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=121826272&loc=d3e32687-109319 + Details
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- Definition Amount of interest expense accrued for an underpayment of income taxes. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=121826272&loc=d3e32718-109319 + Details
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- Definition The total amount of unrecognized tax benefits that, if recognized, would affect the effective tax rate. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121826272&loc=SL6600010-109319 + Details
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