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Note 5 - Credit Quality - Loans Modified as Troubled Debt Restructurings (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)
Total contracts	12	10
Post-modification recorded investment	$ 4,927	$ 1,152
Pre-modification recorded investment	$ 4,958	$ 1,223
Total contracts, payment default	1	0
Recorded investment, payment default	$ 53	$ 0
Single Family Owner Occupied [Member]
Total contracts, payment default	1	0
Recorded investment, payment default	$ 53	$ 0
Below Market Interest Rate [Member] | Single Family Owner Occupied [Member]
Total contracts	1	0
Post-modification recorded investment	$ 50	$ 0
Pre-modification recorded investment		$ 0
Below Market Interest Rate and Extended Payment Term [Member] | Single Family Non-owner Occupied [Member]
Total contracts		6
Post-modification recorded investment		$ 871
Pre-modification recorded investment		887
Payment Deferral [Member]
Total contracts	11
Post-modification recorded investment	$ 4,877	281
Pre-modification recorded investment	$ 4,908
Payment Deferral [Member] | Single Family Owner Occupied [Member]
Total contracts	5
Post-modification recorded investment	$ 1,054	$ 279
Pre-modification recorded investment	$ 1,085
Payment Deferral [Member] | Construction, Development and Other Land [Member]
Total contracts	3	0
Post-modification recorded investment	$ 1,708	$ 0
Pre-modification recorded investment	$ 1,708	$ 0
Payment Deferral [Member] | Non-farm, Non-residential [Member]
Total contracts	3
Post-modification recorded investment	$ 2,115
Pre-modification recorded investment	$ 2,115
Payment Deferral [Member] | Home Equity Lines [Member]
Total contracts	0	1
Post-modification recorded investment	$ 0	$ 2
Pre-modification recorded investment	$ 0	$ 5

X

- Definition

Number of financing receivables that have been modified by troubled debt restructurings.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 33
-URI http://asc.fasb.org/extlink&oid=121611835&loc=SL6953676-111524

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- Definition

Amount, after troubled debt restructuring, of modified financing receivable.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 33
-URI http://asc.fasb.org/extlink&oid=121611835&loc=SL6953676-111524

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Amount, before troubled debt restructuring, of financing receivable to be modified.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 33
-URI http://asc.fasb.org/extlink&oid=121611835&loc=SL6953676-111524

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+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 34
-URI http://asc.fasb.org/extlink&oid=121611835&loc=SL6953682-111524

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+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 34
-Subparagraph (a)(2)
-URI http://asc.fasb.org/extlink&oid=121611835&loc=SL6953682-111524

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