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Note 7 - Loans Receivable and Credit Disclosures - Past Due Loans (Details) - USD ($) $ in Thousands		Sep. 30, 2022	Dec. 31, 2021
Loans receivable		$ 1,190,768	$ 1,160,667
Financing receivable, recorded investment, 90 days past due and still accruing		12	169
Financing Receivables 30 to 89 Days Past Due [Member]
Loans receivable		1,899	1,724
Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Loans receivable		1,652	497
Financial Asset, Past Due [Member]
Loans receivable		3,551	2,221
Financial Asset, Not Past Due [Member]
Loans receivable		1,187,217	1,158,446
Construction Real Estate [Member]
Loans receivable		42,816	42,638
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		305	0
Construction Real Estate [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Loans receivable		0	0
Construction Real Estate [Member] | Financial Asset, Past Due [Member]
Loans receivable		305	0
Construction Real Estate [Member] | Financial Asset, Not Past Due [Member]
Loans receivable		42,511	42,638
Family Residential Real Estate 1-4 [Member]
Loans receivable		281,046	246,745
Financing receivable, recorded investment, 90 days past due and still accruing		7	169
Family Residential Real Estate 1-4 [Member] | Financing Receivables 30 to 89 Days Past Due [Member]
Loans receivable		701	1,198
Family Residential Real Estate 1-4 [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Loans receivable		72	482
Family Residential Real Estate 1-4 [Member] | Financial Asset, Past Due [Member]
Loans receivable		773	1,680
Family Residential Real Estate 1-4 [Member] | Financial Asset, Not Past Due [Member]
Loans receivable		280,273	245,065
Commercial Real Estate Portfolio Segment [Member]
Loans receivable		519,345	515,367
Financing receivable, recorded investment, 90 days past due and still accruing		0	0
Commercial Real Estate Portfolio Segment [Member] | Financing Receivables 30 to 89 Days Past Due [Member]
Loans receivable		512	24
Commercial Real Estate Portfolio Segment [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Loans receivable		1,483	0
Commercial Real Estate Portfolio Segment [Member] | Financial Asset, Past Due [Member]
Loans receivable		1,995	24
Commercial Real Estate Portfolio Segment [Member] | Financial Asset, Not Past Due [Member]
Loans receivable		517,350	515,343
Agriculture Real Estate [Member]
Loans receivable		159,099	153,457
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	30
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	30
Agriculture Real Estate [Member] | Financial Asset, Not Past Due [Member]
Loans receivable		159,099	153,427
Commercial Portfolio Segment [Member]
Loans receivable	[1]	73,554	75,482
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		276	251
Commercial Portfolio Segment [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Loans receivable		75	15
Commercial Portfolio Segment [Member] | Financial Asset, Past Due [Member]
Loans receivable		351	266
Commercial Portfolio Segment [Member] | Financial Asset, Not Past Due [Member]
Loans receivable		73,203	75,216
Agriculture [Member]
Loans receivable		98,914	111,881
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		67	172
Agriculture [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Loans receivable		12	0
Agriculture [Member] | Financial Asset, Past Due [Member]
Loans receivable		79	172
Agriculture [Member] | Financial Asset, Not Past Due [Member]
Loans receivable		98,835	111,709
Consumer and Other [Member]
Loans receivable		15,994	15,097
Financing receivable, recorded investment, 90 days past due and still accruing		5	0
Consumer and Other [Member] | Financing Receivables 30 to 89 Days Past Due [Member]
Loans receivable		38	49
Consumer and Other [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Loans receivable		10	0
Consumer and Other [Member] | Financial Asset, Past Due [Member]
Loans receivable		48	49
Consumer and Other [Member] | Financial Asset, Not Past Due [Member]
Loans receivable		$ 15,946	$ 15,048
[1] Commercial loan portfolio includes $0.3 million and $6.0 million of Paycheck Protection Program ("PPP") loans as of March 31, 2022 and December 31, 2021, respectively.

X

- Definition

Amortized cost of financing receivable 90 days or more past due and still accruing. Excludes net investment in lease.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 20
-Section 50
-Paragraph 16
-Subparagraph (c)
-URI https://asc.fasb.org/extlink&oid=124255953&loc=SL82919258-210447

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 7
-Subparagraph (b)
-URI https://asc.fasb.org/extlink&oid=123577603&loc=d3e5111-111524

Reference 3: http://www.xbrl.org/2003/role/exampleRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 20
-Section 55
-Paragraph 80
-URI https://asc.fasb.org/extlink&oid=124267575&loc=SL82922355-210448

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- Definition

Amount before allowance of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Includes deferred interest and fees, undisbursed portion of loan balance, unamortized costs and premiums and discounts from face amounts. Excludes loans and leases covered under loss sharing agreements.

+ References

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-Topic 310
-SubTopic 10
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