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Note 4 - Loans Receivable and Credit Disclosures - Loans Receivable Impairment Analysis (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Ending loans receiveable balance: Individually evaluated for credit losses		$ 14,386
Ending loans receivable balance: Collectively evaluated for credit losses		1,227,322
Loans receivable	$ 1,294,178	1,241,708
Construction Real Estate [Member]
Ending loans receiveable balance: Individually evaluated for credit losses		0
Ending loans receivable balance: Collectively evaluated for credit losses		51,253
Loans receivable	63,050	51,253
Family Residential Real Estate 1-4 [Member]
Ending loans receiveable balance: Individually evaluated for credit losses		805
Ending loans receivable balance: Collectively evaluated for credit losses		284,302
Loans receivable	289,404	285,107
Multifamily [Member]
Ending loans receiveable balance: Individually evaluated for credit losses		0
Ending loans receivable balance: Collectively evaluated for credit losses		185,784
Loans receivable	195,536	185,784
Commercial Real Estate Portfolio Segment [Member]
Ending loans receiveable balance: Individually evaluated for credit losses		12,853
Ending loans receivable balance: Collectively evaluated for credit losses		340,432
Loans receivable	359,266	353,285
Agriculture Real Estate [Member]
Ending loans receiveable balance: Individually evaluated for credit losses		165
Ending loans receivable balance: Collectively evaluated for credit losses		159,283
Loans receivable	161,517	159,448
Commercial Portfolio Segment [Member]
Ending loans receiveable balance: Individually evaluated for credit losses		200
Ending loans receivable balance: Collectively evaluated for credit losses		77,065
Loans receivable	89,729	77,265
Agriculture [Member]
Ending loans receiveable balance: Individually evaluated for credit losses		342
Ending loans receivable balance: Collectively evaluated for credit losses		113,013
Loans receivable	119,136	113,355
Consumer and Other [Member]
Ending loans receiveable balance: Individually evaluated for credit losses		21
Ending loans receivable balance: Collectively evaluated for credit losses		16,190
Loans receivable	$ 16,540	$ 16,211

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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Period Type:	instant

X

- Definition

The balance of financing receivables that were collectively evaluated for impairment.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 4
-Subparagraph (SAB Topic 6.L(5)(a))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480418/310-10-S99-4

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 11C
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481962/310-10-50-11C

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X

- Definition

The balance of financing receivables that were individually evaluated for impairment.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 11C
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481962/310-10-50-11C

Reference 2: http://www.xbrl.org/2003/role/exampleRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 4
-Subparagraph (SAB Topic 6.L(5)(a))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480418/310-10-S99-4

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