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Note 4 - Loans Receivable and Credit Disclosures - Past Due Loans (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Loans receivable	$ 1,294,178	$ 1,241,708
Financing receivable, recorded investment, 90 days past due and still accruing	109	0
Financing Receivables 30 to 89 Days Past Due [Member]
Loans receivable	2,242	4,404
Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Loans receivable	2,084	1,451
Financial Asset, Past Due [Member]
Loans receivable	4,326	5,855
Financial Asset, Not Past Due [Member]
Loans receivable	1,289,852	1,235,853
Construction Real Estate [Member]
Loans receivable	63,050	51,253
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	359	66
Construction Real Estate [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Loans receivable	66	0
Construction Real Estate [Member] | Financial Asset, Past Due [Member]
Loans receivable	425	66
Construction Real Estate [Member] | Financial Asset, Not Past Due [Member]
Loans receivable	62,625	51,187
Family Residential Real Estate 1-4 [Member]
Loans receivable	289,404	285,107
Financing receivable, recorded investment, 90 days past due and still accruing	3	0
Family Residential Real Estate 1-4 [Member] | Financing Receivables 30 to 89 Days Past Due [Member]
Loans receivable	1,020	944
Family Residential Real Estate 1-4 [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Loans receivable	302	11
Family Residential Real Estate 1-4 [Member] | Financial Asset, Past Due [Member]
Loans receivable	1,322	955
Family Residential Real Estate 1-4 [Member] | Financial Asset, Not Past Due [Member]
Loans receivable	288,082	284,152
Multifamily [Member]
Loans receivable	195,536	185,784
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	983	0
Multifamily [Member] | Financial Asset, Past Due [Member]
Loans receivable	983	0
Multifamily [Member] | Financial Asset, Not Past Due [Member]
Loans receivable	194,553	185,784
Commercial Real Estate Portfolio Segment [Member]
Loans receivable	359,266	353,285
Financing receivable, recorded investment, 90 days past due and still accruing	106	0
Commercial Real Estate Portfolio Segment [Member] | Financing Receivables 30 to 89 Days Past Due [Member]
Loans receivable	119	2,362
Commercial Real Estate Portfolio Segment [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Loans receivable	106	1,399
Commercial Real Estate Portfolio Segment [Member] | Financial Asset, Past Due [Member]
Loans receivable	225	3,761
Commercial Real Estate Portfolio Segment [Member] | Financial Asset, Not Past Due [Member]
Loans receivable	359,041	349,524
Agriculture Real Estate [Member]
Loans receivable	161,517	159,448
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	0	185
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	0	185
Agriculture Real Estate [Member] | Financial Asset, Not Past Due [Member]
Loans receivable	161,517	159,263
Commercial Portfolio Segment [Member]
Loans receivable	89,729	77,265
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	559	592
Commercial Portfolio Segment [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Loans receivable	98	7
Commercial Portfolio Segment [Member] | Financial Asset, Past Due [Member]
Loans receivable	657	599
Commercial Portfolio Segment [Member] | Financial Asset, Not Past Due [Member]
Loans receivable	89,072	76,666
Agriculture [Member]
Loans receivable	119,136	113,355
Financing receivable, recorded investment, 90 days past due and still accruing	0	0
Agriculture [Member] | Financing Receivables 30 to 89 Days Past Due [Member]
Loans receivable	169	218
Agriculture [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Loans receivable	529	30
Agriculture [Member] | Financial Asset, Past Due [Member]
Loans receivable	698	248
Agriculture [Member] | Financial Asset, Not Past Due [Member]
Loans receivable	118,438	113,107
Consumer and Other [Member]
Loans receivable	16,540	16,211
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	16	37
Consumer and Other [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Loans receivable	0	4
Consumer and Other [Member] | Financial Asset, Past Due [Member]
Loans receivable	16	41
Consumer and Other [Member] | Financial Asset, Not Past Due [Member]
Loans receivable	$ 16,524	$ 16,170

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/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 5
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479319/326-20-50-5

Reference 2: 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 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//1943274/2147479853/942-210-S99-1

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X

- Definition

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+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 55
-Paragraph 80
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479294/326-20-55-80

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
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-Name Accounting Standards Codification
-Section 50
-Paragraph 16
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479319/326-20-50-16

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
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-Paragraph 7
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-Topic 310
-Publisher FASB
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