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Note 7 - Loans Receivable and Credit Disclosures - Past Due Loans (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Loans receivable	$ 1,289,470	$ 1,294,178
Financing receivable, recorded investment, 90 days past due and still accruing	110	109
Financing Receivables 30 to 89 Days Past Due [Member]
Loans receivable	1,558	2,242
Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Loans receivable	1,796	2,084
Financial Asset, Past Due [Member]
Loans receivable	3,354	4,326
Financial Asset, Not Past Due [Member]
Loans receivable	1,286,116	1,289,852
Construction Real Estate [Member]
Loans receivable	70,095	63,050
Financing receivable, recorded investment, 90 days past due and still accruing	0	0
Construction Real Estate [Member] | Financing Receivables 30 to 89 Days Past Due [Member]
Loans receivable	0	359
Construction Real Estate [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Loans receivable	0	66
Construction Real Estate [Member] | Financial Asset, Past Due [Member]
Loans receivable	0	425
Construction Real Estate [Member] | Financial Asset, Not Past Due [Member]
Loans receivable	70,095	62,625
Family Residential Real Estate 1-4 [Member]
Loans receivable	288,988	289,404
Financing receivable, recorded investment, 90 days past due and still accruing	96	3
Family Residential Real Estate 1-4 [Member] | Financing Receivables 30 to 89 Days Past Due [Member]
Loans receivable	978	1,020
Family Residential Real Estate 1-4 [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Loans receivable	309	302
Family Residential Real Estate 1-4 [Member] | Financial Asset, Past Due [Member]
Loans receivable	1,287	1,322
Family Residential Real Estate 1-4 [Member] | Financial Asset, Not Past Due [Member]
Loans receivable	287,701	288,082
Multifamily [Member]
Loans receivable	196,010	195,536
Financing receivable, recorded investment, 90 days past due and still accruing	0	0
Multifamily [Member] | Financing Receivables 30 to 89 Days Past Due [Member]
Loans receivable	0	0
Multifamily [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Loans receivable	982	983
Multifamily [Member] | Financial Asset, Past Due [Member]
Loans receivable	982	983
Multifamily [Member] | Financial Asset, Not Past Due [Member]
Loans receivable	195,028	194,553
Commercial Real Estate Portfolio Segment [Member]
Loans receivable	353,061	359,266
Financing receivable, recorded investment, 90 days past due and still accruing	0	106
Commercial Real Estate Portfolio Segment [Member] | Financing Receivables 30 to 89 Days Past Due [Member]
Loans receivable	118	119
Commercial Real Estate Portfolio Segment [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Loans receivable	0	106
Commercial Real Estate Portfolio Segment [Member] | Financial Asset, Past Due [Member]
Loans receivable	118	225
Commercial Real Estate Portfolio Segment [Member] | Financial Asset, Not Past Due [Member]
Loans receivable	352,943	359,041
Agriculture Real Estate [Member]
Loans receivable	160,457	161,517
Financing receivable, recorded investment, 90 days past due and still accruing	0	0
Agriculture Real Estate [Member] | Financing Receivables 30 to 89 Days Past Due [Member]
Loans receivable	111	0
Agriculture Real Estate [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Loans receivable	0	0
Agriculture Real Estate [Member] | Financial Asset, Past Due [Member]
Loans receivable	111	0
Agriculture Real Estate [Member] | Financial Asset, Not Past Due [Member]
Loans receivable	160,346	161,517
Commercial Portfolio Segment [Member]
Loans receivable	87,751	89,729
Financing receivable, recorded investment, 90 days past due and still accruing	0	0
Commercial Portfolio Segment [Member] | Financing Receivables 30 to 89 Days Past Due [Member]
Loans receivable	213	559
Commercial Portfolio Segment [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Loans receivable	95	98
Commercial Portfolio Segment [Member] | Financial Asset, Past Due [Member]
Loans receivable	308	657
Commercial Portfolio Segment [Member] | Financial Asset, Not Past Due [Member]
Loans receivable	87,443	89,072
Agriculture [Member]
Loans receivable	117,254	119,136
Financing receivable, recorded investment, 90 days past due and still accruing	14	0
Agriculture [Member] | Financing Receivables 30 to 89 Days Past Due [Member]
Loans receivable	134	169
Agriculture [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Loans receivable	403	529
Agriculture [Member] | Financial Asset, Past Due [Member]
Loans receivable	537	698
Agriculture [Member] | Financial Asset, Not Past Due [Member]
Loans receivable	116,717	118,438
Consumer and Other [Member]
Loans receivable	15,854	16,540
Financing receivable, recorded investment, 90 days past due and still accruing	0	0
Consumer and Other [Member] | Financing Receivables 30 to 89 Days Past Due [Member]
Loans receivable	4	16
Consumer and Other [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Loans receivable	7	0
Consumer and Other [Member] | Financial Asset, Past Due [Member]
Loans receivable	11	16
Consumer and Other [Member] | Financial Asset, Not Past Due [Member]
Loans receivable	$ 15,843	$ 16,524

X

- Definition

Amortized cost, before allowance for credit loss, fee, and loan in process, of financing receivable. Excludes financing receivable covered under loss sharing agreement and net investment in lease.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481990/310-10-45-2

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
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-Section 50
-Paragraph 5
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-5

Reference 3: 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))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478546/942-210-S99-1

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X

- Definition

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+ References

Reference 1: http://fasb.org/us-gaap/role/ref/otherTransitionRef
-Topic 310
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-Name Accounting Standards Codification
-Section 50
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Reference 2: http://www.xbrl.org/2003/role/exampleRef
-Topic 326
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