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Note 7 - Loans Receivable and Credit Disclosures - Average Recorded Investment and Interest Income Recognized on Impaired Loans (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2022 USD ($)
Impaired financing receivable, with no related allowance, average recorded investment	$ 1,852
Impaired financing receivable, with no related allowance, interest income, accrual method	7
Impaired financing receivable, with related allowance, average recorded investment	10,385
Impaired financing receivable, with related allowance, interest income, accrual method	0
Impaired financing receivable, average recorded investment	12,237
Impaired financing receivable, interest income, accrual method	7
Construction Real Estate [Member]
Impaired financing receivable, with no related allowance, average recorded investment	0
Impaired financing receivable, with no related allowance, interest income, accrual method	0
Impaired financing receivable, with related allowance, average recorded investment	0
Impaired financing receivable, with related allowance, interest income, accrual method	0
Impaired financing receivable, average recorded investment	0
Impaired financing receivable, interest income, accrual method	0
Family Residential Real Estate 1-4 [Member]
Impaired financing receivable, with no related allowance, average recorded investment	664
Impaired financing receivable, with no related allowance, interest income, accrual method	3
Impaired financing receivable, with related allowance, average recorded investment	314
Impaired financing receivable, with related allowance, interest income, accrual method	0
Impaired financing receivable, average recorded investment	978
Impaired financing receivable, interest income, accrual method	3
Multifamily [Member]
Impaired financing receivable, with no related allowance, average recorded investment	0
Impaired financing receivable, with no related allowance, interest income, accrual method	0
Impaired financing receivable, with related allowance, average recorded investment	0
Impaired financing receivable, with related allowance, interest income, accrual method	0
Impaired financing receivable, average recorded investment	0
Impaired financing receivable, interest income, accrual method	0
Commercial Real Estate Portfolio Segment [Member]
Impaired financing receivable, with no related allowance, average recorded investment	123
Impaired financing receivable, with no related allowance, interest income, accrual method	0
Impaired financing receivable, with related allowance, average recorded investment	9,668
Impaired financing receivable, with related allowance, interest income, accrual method	0
Impaired financing receivable, average recorded investment	9,791
Impaired financing receivable, interest income, accrual method	0
Agriculture Real Estate [Member]
Impaired financing receivable, with no related allowance, average recorded investment	544
Impaired financing receivable, with no related allowance, interest income, accrual method	0
Impaired financing receivable, with related allowance, average recorded investment	0
Impaired financing receivable, with related allowance, interest income, accrual method	0
Impaired financing receivable, average recorded investment	544
Impaired financing receivable, interest income, accrual method	0
Commercial Portfolio Segment [Member]
Impaired financing receivable, with no related allowance, average recorded investment	227
Impaired financing receivable, with no related allowance, interest income, accrual method	4
Impaired financing receivable, with related allowance, average recorded investment	70
Impaired financing receivable, with related allowance, interest income, accrual method	0
Impaired financing receivable, average recorded investment	297
Impaired financing receivable, interest income, accrual method	4
Agriculture [Member]
Impaired financing receivable, with no related allowance, average recorded investment	289
Impaired financing receivable, with no related allowance, interest income, accrual method	0
Impaired financing receivable, with related allowance, average recorded investment	312
Impaired financing receivable, with related allowance, interest income, accrual method	0
Impaired financing receivable, average recorded investment	601
Impaired financing receivable, interest income, accrual method	0
Consumer and Other [Member]
Impaired financing receivable, with no related allowance, average recorded investment	5
Impaired financing receivable, with no related allowance, interest income, accrual method	0
Impaired financing receivable, with related allowance, average recorded investment	21
Impaired financing receivable, with related allowance, interest income, accrual method	0
Impaired financing receivable, average recorded investment	26
Impaired financing receivable, interest income, accrual method	$ 0

X

- Definition

Average 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 15
-Subparagraph (c)(1)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481962/310-10-50-15

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 17
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481962/310-10-50-17

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- Definition

Amount of interest income recognized that the financing receivables (with related allowance for credit losses and without a related allowance for credit losses) were impaired.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 15
-Subparagraph (c)(2)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481962/310-10-50-15

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- Definition

Amount of average investment 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 (c)(1)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481962/310-10-50-15

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 17
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481962/310-10-50-17

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- Definition

Amount of interest income, recognized on accrual basis, on financing receivables that are recognized as impaired, 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 (c)(2)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481962/310-10-50-15

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Amount of average investment 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 (c)(1)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481962/310-10-50-15

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 17
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481962/310-10-50-17

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Amount of interest income, recognized on accrual basis, on financing receivables, for which there is a related allowance for credit losses and are recognized as impaired.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 15
-Subparagraph (c)(2)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481962/310-10-50-15

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