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Note 7 - Loans - Nonaccrual Loans and Loans Past Due Ninety Days or More and Still Accruing (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Loans past due 90+ days and accruing	$ 2,093	$ 1,207
Nonaccrual loans	12,309	9,218
Residential Portfolio Segment [Member]
Loans past due 90+ days and accruing	1,188	1,002
Nonaccrual loans	5,285	5,078
Residential Portfolio Segment [Member] | Real Estate Loan [Member] | Senior Lien [Member]
Loans past due 90+ days and accruing	983	878
Nonaccrual loans	4,818	4,679
Residential Portfolio Segment [Member] | Real Estate Loan [Member] | Junior Lien [Member]
Loans past due 90+ days and accruing	98	53
Nonaccrual loans	354	326
Residential Portfolio Segment [Member] | Home Equity Line of Credit 1 [Member]
Loans past due 90+ days and accruing	107	71
Nonaccrual loans	74	73
Residential Portfolio Segment [Member] | Construction Loans [Member]
Loans past due 90+ days and accruing	0	0
Nonaccrual loans	39	0
Commercial Portfolio Segment [Member]
Loans past due 90+ days and accruing	785	165
Nonaccrual loans	7,009	4,124
Commercial Portfolio Segment [Member] | Real Estate Loan [Member]
Loans past due 90+ days and accruing	496	107
Nonaccrual loans	744	1,148
Commercial Portfolio Segment [Member] | Construction Loans [Member]
Loans past due 90+ days and accruing	0	0
Nonaccrual loans	1,305	1,311
Commercial Portfolio Segment [Member] | Commercial and Industrial [Member]
Loans past due 90+ days and accruing	59	15
Nonaccrual loans	4,487	1,051
Commercial Portfolio Segment [Member] | Loans Secured by Farmland [Member]
Loans past due 90+ days and accruing	229	43
Nonaccrual loans	424	565
Commercial Portfolio Segment [Member] | Agricultural Loans [Member]
Loans past due 90+ days and accruing	1	0
Nonaccrual loans	0	0
Commercial Portfolio Segment [Member] | Other Commercial Loans [Member]
Loans past due 90+ days and accruing	0	0
Nonaccrual loans	49	49
Consumer Portfolio Segment [Member]
Loans past due 90+ days and accruing	120	40
Nonaccrual loans	$ 15	$ 16

X

- Definition

Amount of financing receivable 90 days or more past due and still accruing.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 20
-Section 50
-Paragraph 16
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=121599337&loc=SL82919258-210447

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 7
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=121611835&loc=d3e5111-111524

Reference 3: http://www.xbrl.org/2003/role/exampleRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 20
-Section 55
-Paragraph 80
-URI http://asc.fasb.org/extlink&oid=121647567&loc=SL82922355-210448

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X

- Definition

Amount of financing receivable on nonaccrual status.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 7
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-URI http://asc.fasb.org/extlink&oid=121611835&loc=d3e5111-111524

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 20
-Section 50
-Paragraph 16
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=121599337&loc=SL82919258-210447

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