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Note 7 - Loans Receivable and Credit Disclosures - Allowance for Loan Losses Impairment Analysis (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Mar. 31, 2023	Dec. 31, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021
Individually evaluated for credit losses	$ 192		$ 95
Collectively evaluated for credit losses	16,127		15,602
Balance June 30, 2023	16,319	$ 16,269	15,697	$ 16,420	$ 16,484	$ 16,621
Construction Real Estate [Member]
Individually evaluated for credit losses	0		0
Collectively evaluated for credit losses	412		730
Balance June 30, 2023	412	391	730	606	645	675
Family Residential Real Estate 1-4 [Member]
Individually evaluated for credit losses	10		10
Collectively evaluated for credit losses	3,347		3,018
Balance June 30, 2023	3,357	3,288	3,028	2,920	2,899	2,752
Multifamily [Member]
Individually evaluated for credit losses	0		0
Collectively evaluated for credit losses	2,524		2,493
Balance June 30, 2023	2,524	2,568	2,493	2,517	2,433	2,501
Commercial Real Estate Portfolio Segment [Member]
Individually evaluated for credit losses	0		0
Collectively evaluated for credit losses	5,033		4,742
Balance June 30, 2023	5,033	5,206	4,742	5,843	5,881	5,905
Agriculture Real Estate [Member]
Individually evaluated for credit losses	0		0
Collectively evaluated for credit losses	1,214		1,625
Balance June 30, 2023	1,214	1,218	1,625	1,692	1,630	1,584
Commercial Portfolio Segment [Member]
Individually evaluated for credit losses	97		0
Collectively evaluated for credit losses	1,917		1,153
Balance June 30, 2023	2,014	1,784	1,153	1,125	1,152	1,170
Agriculture [Member]
Individually evaluated for credit losses	70		68
Collectively evaluated for credit losses	1,288		1,637
Balance June 30, 2023	1,358	1,392	1,705	1,484	1,606	1,836
Consumer and Other [Member]
Individually evaluated for credit losses	15		17
Collectively evaluated for credit losses	392		204
Balance June 30, 2023	$ 407	$ 422	$ 221	$ 233	$ 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.

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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

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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
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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-Publisher SEC

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Name Regulation S-K (SK)
-Number 229
-Section 1405
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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
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-Name Accounting Standards Codification
-Section 45
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-Publisher FASB
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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
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Reference 8: http://www.xbrl.org/2003/role/disclosureRef
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Reference 9: http://www.xbrl.org/2003/role/disclosureRef
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-Paragraph 13
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-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479319/326-20-50-13

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