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Note 7 - Loans Receivable and Credit Disclosures - Impaired Loans (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Impaired financing receivable with no related allowance, recorded investment	$ 1,793	$ 1,908
Impaired financing receivable with no related allowance, unpaid principal balance	2,226	2,680
Impaired financing receivable with related allowance, recorded investment	10,364	10,404
Impaired financing receivable with related allowance, unpaid principal balance	10,721	10,751
Impaired financing receivable, related allowance	1,373	1,392
Impaired financing receivable, recorded investment	12,157	12,312
Impaired financing receivable, unpaid principal balance	12,947	13,431
Construction Real Estate [Member]
Impaired financing receivable with no related allowance, recorded investment	0	0
Impaired financing receivable with no related allowance, unpaid principal balance	0	0
Impaired financing receivable with related allowance, recorded investment	0	0
Impaired financing receivable with related allowance, unpaid principal balance	0	0
Impaired financing receivable, related allowance	0	0
Impaired financing receivable, recorded investment	0	0
Impaired financing receivable, unpaid principal balance	0	0
Family Residential Real Estate 1-4 [Member]
Impaired financing receivable with no related allowance, recorded investment	651	677
Impaired financing receivable with no related allowance, unpaid principal balance	719	739
Impaired financing receivable with related allowance, recorded investment	325	303
Impaired financing receivable with related allowance, unpaid principal balance	341	314
Impaired financing receivable, related allowance	53	40
Impaired financing receivable, recorded investment	976	980
Impaired financing receivable, unpaid principal balance	1,060	1,053
Commercial Real Estate Portfolio Segment [Member]
Impaired financing receivable with no related allowance, recorded investment	121	124
Impaired financing receivable with no related allowance, unpaid principal balance	140	142
Impaired financing receivable with related allowance, recorded investment	9,668	9,668
Impaired financing receivable with related allowance, unpaid principal balance	10,001	10,001
Impaired financing receivable, related allowance	1,139	1,139
Impaired financing receivable, recorded investment	9,789	9,792
Impaired financing receivable, unpaid principal balance	10,141	10,143
Agriculture Real Estate [Member]
Impaired financing receivable with no related allowance, recorded investment	542	546
Impaired financing receivable with no related allowance, unpaid principal balance	617	1,001
Impaired financing receivable with related allowance, recorded investment	0	0
Impaired financing receivable with related allowance, unpaid principal balance	0	0
Impaired financing receivable, related allowance	0	0
Impaired financing receivable, recorded investment	542	546
Impaired financing receivable, unpaid principal balance	617	1,001
Commercial Portfolio Segment [Member]
Impaired financing receivable with no related allowance, recorded investment	220	233
Impaired financing receivable with no related allowance, unpaid principal balance	258	269
Impaired financing receivable with related allowance, recorded investment	42	97
Impaired financing receivable with related allowance, unpaid principal balance	42	98
Impaired financing receivable, related allowance	42	60
Impaired financing receivable, recorded investment	262	330
Impaired financing receivable, unpaid principal balance	300	367
Agriculture [Member]
Impaired financing receivable with no related allowance, recorded investment	255	322
Impaired financing receivable with no related allowance, unpaid principal balance	486	521
Impaired financing receivable with related allowance, recorded investment	309	315
Impaired financing receivable with related allowance, unpaid principal balance	315	315
Impaired financing receivable, related allowance	119	132
Impaired financing receivable, recorded investment	564	637
Impaired financing receivable, unpaid principal balance	801	836
Consumer and Other [Member]
Impaired financing receivable with no related allowance, recorded investment	4	6
Impaired financing receivable with no related allowance, unpaid principal balance	6	8
Impaired financing receivable with related allowance, recorded investment	20	21
Impaired financing receivable with related allowance, unpaid principal balance	22	23
Impaired financing receivable, related allowance	20	21
Impaired financing receivable, recorded investment	24	27
Impaired financing receivable, unpaid principal balance	$ 28	$ 31

X

- Definition

Amount of investment of impaired financing receivables with related allowance for credit losses and without a related allowance for credit losses.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 14A
-Subparagraph (b)
-URI https://asc.fasb.org/extlink&oid=123577603&loc=SL6953550-111524

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- Definition

Amount of allowance for credit losses related to recorded investment.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 15
-Subparagraph (a)(3)
-URI https://asc.fasb.org/extlink&oid=123577603&loc=d3e5212-111524

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- Definition

Amount of unpaid principal balance of impaired financing receivables with related allowance for credit losses and without related allowance for credit losses.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 15
-Subparagraph (a)(4)
-URI https://asc.fasb.org/extlink&oid=123577603&loc=d3e5212-111524

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+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 14A
-Subparagraph (b)
-URI https://asc.fasb.org/extlink&oid=123577603&loc=SL6953550-111524

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+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 15
-Subparagraph (a)(4)
-URI https://asc.fasb.org/extlink&oid=123577603&loc=d3e5212-111524

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+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 14A
-Subparagraph (b)
-URI https://asc.fasb.org/extlink&oid=123577603&loc=SL6953550-111524

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+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 15
-Subparagraph (a)(4)
-URI https://asc.fasb.org/extlink&oid=123577603&loc=d3e5212-111524

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