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Note 7 - Loans Receivable and Credit Disclosures - Allowance for Loan Losses Impairment Analysis (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022	Mar. 31, 2022	Dec. 31, 2021
Individually evaluated for credit losses	$ 119	$ 95
Collectively evaluated for credit losses	16,150	15,602
Balance	16,269	15,697	$ 16,484	$ 16,621
Construction Real Estate [Member]
Individually evaluated for credit losses	0	0
Collectively evaluated for credit losses	391	730
Balance	391	730	645	675
Family Residential Real Estate 1-4 [Member]
Individually evaluated for credit losses	22	10
Collectively evaluated for credit losses	3,266	3,018
Balance	3,288	3,028	2,899	2,752
Multifamily [Member]
Individually evaluated for credit losses	0	0
Collectively evaluated for credit losses	2,568	2,493
Balance	2,568	2,493	2,433	2,501
Commercial Real Estate Portfolio Segment [Member]
Individually evaluated for credit losses	0	0
Collectively evaluated for credit losses	5,206	4,742
Balance	5,206	4,742	5,881	5,905
Agriculture Real Estate [Member]
Individually evaluated for credit losses	0	0
Collectively evaluated for credit losses	1,218	1,625
Balance	1,218	1,625	1,630	1,584
Commercial Portfolio Segment [Member]
Individually evaluated for credit losses	0	0
Collectively evaluated for credit losses	1,784	1,153
Balance	1,784	1,153	1,152	1,170
Agriculture [Member]
Individually evaluated for credit losses	81	68
Collectively evaluated for credit losses	1,311	1,637
Balance	1,392	1,705	1,606	1,836
Consumer and Other [Member]
Individually evaluated for credit losses	16	17
Collectively evaluated for credit losses	406	204
Balance	$ 422	$ 221	$ 238	$ 198

X

- Definition

The valuation allowance for financing receivables that are expected to be uncollectible that were collectively evaluated for impairment.

+ References

No definition available.

+ Details

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- Definition

Amount of calculation allowance for financing receivables that are expected to be uncollectible that were individually evaluated for impairment.

+ References

No definition available.

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- Definition

Amount of allowance for credit loss on financing receivable. Excludes allowance for financing receivable covered under loss sharing agreement.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(4))
-Publisher FASB
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Name Regulation S-K (SK)
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-Section 1405
-Paragraph (a)
-Subparagraph (1)
-Publisher SEC

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
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Reference 4: http://www.xbrl.org/2003/role/disclosureRef
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Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 45
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479344/326-20-45-1

Reference 6: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 942
-SubTopic 210
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(7)(2))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479853/942-210-S99-1

Reference 7: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section 50
-Paragraph 11B
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Reference 8: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 13
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479319/326-20-50-13

Reference 9: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
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-Name Accounting Standards Codification
-Section 50
-Paragraph 13
-Subparagraph (f)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479319/326-20-50-13

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