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Note 7 - Loans Receivable and Credit Disclosures - Impaired Loans (Details) $ in Thousands	Dec. 31, 2022 USD ($)
Impaired financing receivable with no related allowance, recorded investment	$ 13,987
Impaired financing receivable with no related allowance, unpaid principal balance	14,837
Impaired financing receivable with related allowance, recorded investment	399
Impaired financing receivable with related allowance, unpaid principal balance	436
Impaired financing receivable, related allowance	95
Impaired financing receivable, recorded investment	14,386
Impaired financing receivable, unpaid principal balance	15,273
Construction Real Estate [Member]
Impaired financing receivable with no related allowance, recorded investment	0
Impaired financing receivable with no related allowance, unpaid principal balance	0
Impaired financing receivable with related allowance, recorded investment	0
Impaired financing receivable with related allowance, unpaid principal balance	0
Impaired financing receivable, related allowance	0
Impaired financing receivable, recorded investment	0
Impaired financing receivable, unpaid principal balance	0
Family Residential Real Estate 1-4 [Member]
Impaired financing receivable with no related allowance, recorded investment	687
Impaired financing receivable with no related allowance, unpaid principal balance	721
Impaired financing receivable with related allowance, recorded investment	118
Impaired financing receivable with related allowance, unpaid principal balance	123
Impaired financing receivable, related allowance	10
Impaired financing receivable, recorded investment	805
Impaired financing receivable, unpaid principal balance	844
Multifamily [Member]
Impaired financing receivable with no related allowance, recorded investment	0
Impaired financing receivable with no related allowance, unpaid principal balance	0
Impaired financing receivable with related allowance, recorded investment	0
Impaired financing receivable with related allowance, unpaid principal balance	0
Impaired financing receivable, related allowance	0
Impaired financing receivable, recorded investment	0
Impaired financing receivable, unpaid principal balance	0
Commercial Real Estate Portfolio Segment [Member]
Impaired financing receivable with no related allowance, recorded investment	12,853
Impaired financing receivable with no related allowance, unpaid principal balance	13,578
Impaired financing receivable with related allowance, recorded investment	0
Impaired financing receivable with related allowance, unpaid principal balance	0
Impaired financing receivable, related allowance	0
Impaired financing receivable, recorded investment	12,853
Impaired financing receivable, unpaid principal balance	13,578
Agriculture Real Estate [Member]
Impaired financing receivable with no related allowance, recorded investment	165
Impaired financing receivable with no related allowance, unpaid principal balance	194
Impaired financing receivable with related allowance, recorded investment	0
Impaired financing receivable with related allowance, unpaid principal balance	0
Impaired financing receivable, related allowance	0
Impaired financing receivable, recorded investment	165
Impaired financing receivable, unpaid principal balance	194
Commercial Portfolio Segment [Member]
Impaired financing receivable with no related allowance, recorded investment	200
Impaired financing receivable with no related allowance, unpaid principal balance	249
Impaired financing receivable with related allowance, recorded investment	0
Impaired financing receivable with related allowance, unpaid principal balance	0
Impaired financing receivable, related allowance	0
Impaired financing receivable, recorded investment	200
Impaired financing receivable, unpaid principal balance	249
Agriculture [Member]
Impaired financing receivable with no related allowance, recorded investment	78
Impaired financing receivable with no related allowance, unpaid principal balance	88
Impaired financing receivable with related allowance, recorded investment	264
Impaired financing receivable with related allowance, unpaid principal balance	294
Impaired financing receivable, related allowance	68
Impaired financing receivable, recorded investment	342
Impaired financing receivable, unpaid principal balance	382
Consumer and Other [Member]
Impaired financing receivable with no related allowance, recorded investment	4
Impaired financing receivable with no related allowance, unpaid principal balance	7
Impaired financing receivable with related allowance, recorded investment	17
Impaired financing receivable with related allowance, unpaid principal balance	19
Impaired financing receivable, related allowance	17
Impaired financing receivable, recorded investment	21
Impaired financing receivable, unpaid principal balance	$ 26

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
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 14A
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481962/310-10-50-14A

+ Details

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Namespace Prefix:	us-gaap_
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Balance Type:	debit
Period Type:	instant

X

- Definition

Amount of allowance for credit losses related to recorded investment.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 15
-Subparagraph (a)(3)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481962/310-10-50-15

+ Details

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X

- 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
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 15
-Subparagraph (a)(4)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481962/310-10-50-15

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X

- Definition

Amount of investment in impaired financing receivables for which there is no related allowance for credit losses.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 14A
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481962/310-10-50-14A

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X

- Definition

Amount of unpaid principal balance of impaired financing receivables for which there is no related allowance for credit losses.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 15
-Subparagraph (a)(4)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481962/310-10-50-15

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X

- Definition

Amount of investment in impaired financing receivables for which there is a related allowance for credit losses.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 14A
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481962/310-10-50-14A

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- Definition

Unpaid principal balance of impaired financing receivables for which there is a related allowance for credit losses.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 15
-Subparagraph (a)(4)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481962/310-10-50-15

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