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Note 3 - Loans and Allowance for Loan Losses - Credit Risk Profile (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021	Jun. 30, 2021
Loans	$ 1,081,389	$ 1,016,848	$ 1,004,587
Nonaccrual	1,242	1,727
Agricultural [Member]
Loans	59,063	64,819	46,567
Nonaccrual	314	313
Agricultural [Member] | Pass [Member]
Loans	58,429	61,864
Agricultural [Member] | Special Mention [Member]
Loans	313	339
Agricultural [Member] | Substandard [Member]
Loans	321	2,616
Agricultural [Member] | Doubtful [Member]
Loans	0	0
Consumer Portfolio Segment [Member]
Loans	38,376	35,174	33,370
Nonaccrual	8	0
Consumer Portfolio Segment [Member] | Performing Financial Instruments [Member]
Loans	38,368	35,174
Consumer Portfolio Segment [Member] | Nonperforming Financial Instruments [Member]
Loans	0	0
Commercial and Industrial [Member]
Loans	208,857	203,024	265,032
Nonaccrual	92	285
Commercial and Industrial [Member] | Pass [Member]
Loans	206,399	201,202
Commercial and Industrial [Member] | Special Mention [Member]
Loans	1,342	300
Commercial and Industrial [Member] | Substandard [Member]
Loans	1,116	1,266
Commercial and Industrial [Member] | Doubtful [Member]
Loans	0	256
Construction Real Estate [Member]
Loans	17,950	19,066	15,440
Nonaccrual	0	0
Construction Real Estate [Member] | Performing Financial Instruments [Member]
Loans	17,950	19,066
Construction Real Estate [Member] | Nonperforming Financial Instruments [Member]
Loans	0	0
Commercial Real Estate Portfolio Segment [Member]
Loans	565,163	525,884	473,987
Nonaccrual	0	279
Commercial Real Estate Portfolio Segment [Member] | Pass [Member]
Loans	559,653	519,537
Commercial Real Estate Portfolio Segment [Member] | Special Mention [Member]
Loans	739	778
Commercial Real Estate Portfolio Segment [Member] | Substandard [Member]
Loans	4,771	5,569
Commercial Real Estate Portfolio Segment [Member] | Doubtful [Member]
Loans	0	0
Residential Portfolio Segment [Member]
Loans	191,980	168,881	$ 170,191
Nonaccrual	828	850
Residential Portfolio Segment [Member] | Performing Financial Instruments [Member]
Loans	191,152	168,031
Residential Portfolio Segment [Member] | Nonperforming Financial Instruments [Member]
Loans	$ 0	$ 0

X

- Definition

Amortized cost of financing receivable on nonaccrual status. Excludes net investment in lease.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 7
-Subparagraph (a)
-URI https://asc.fasb.org/extlink&oid=123577603&loc=d3e5111-111524

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 20
-Section 50
-Paragraph 16
-Subparagraph (a)
-URI https://asc.fasb.org/extlink&oid=124255953&loc=SL82919258-210447

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher SEC
-Name Regulation S-K (SK)
-Number 229
-Section 1405
-Paragraph (a)
-Subparagraph (3)

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Publisher SEC
-Name Regulation S-K (SK)
-Number 229
-Section 1405
-Paragraph (a)
-Subparagraph (2)

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X

- Definition

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

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
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-URI https://asc.fasb.org/extlink&oid=123577603&loc=d3e5074-111524

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