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Note 3 - Loans and Allowance for Loan Losses - Credit Risk Profile (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019	Jun. 30, 2019
Loans	$ 907,993	$ 802,048	$ 397,227
Nonaccrual	4,135	4,687
Agricultural [Member]
Loans	50,935	57,339	40,881
Nonaccrual	379	379
Agricultural [Member] | Pass [Member]
Loans	46,822	55,866
Agricultural [Member] | Special Mention [Member]
Loans	3,734	1,094
Agricultural [Member] | Substandard [Member]
Loans	379	379
Agricultural [Member] | Doubtful [Member]
Loans	0	0
Consumer Portfolio Segment [Member]
Loans	33,769	38,854	24,682
Nonaccrual	23	16
Consumer Portfolio Segment [Member] | Performing Financial Instruments [Member]
Loans	33,746	38,838
Consumer Portfolio Segment [Member] | Nonperforming Financial Instruments [Member]
Loans	0	0
Commercial and Industrial [Member]
Loans	242,012	148,083	85,082
Nonaccrual	758	776
Commercial and Industrial [Member] | Pass [Member]
Loans	236,874	146,728
Commercial and Industrial [Member] | Special Mention [Member]
Loans	1,040	1,081
Commercial and Industrial [Member] | Substandard [Member]
Loans	4,098	274
Commercial and Industrial [Member] | Doubtful [Member]
Loans	0	0
Construction Real Estate [Member]
Loans	15,576	13,411	9,948
Nonaccrual	0	0
Construction Real Estate [Member] | Performing Financial Instruments [Member]
Loans	15,576	13,411
Construction Real Estate [Member] | Nonperforming Financial Instruments [Member]
Loans	0	0
Commercial Real Estate Portfolio Segment [Member]
Loans	363,063	326,379	140,942
Nonaccrual	2,146	2,185
Commercial Real Estate Portfolio Segment [Member] | Pass [Member]
Loans	356,813	322,105
Commercial Real Estate Portfolio Segment [Member] | Special Mention [Member]
Loans	2,537	1,332
Commercial Real Estate Portfolio Segment [Member] | Substandard [Member]
Loans	3,492	2,942
Commercial Real Estate Portfolio Segment [Member] | Doubtful [Member]
Loans	221	0
Residential Portfolio Segment [Member]
Loans	202,638	217,982	$ 95,692
Nonaccrual	829	1,331
Residential Portfolio Segment [Member] | Performing Financial Instruments [Member]
Loans	201,809	216,651
Residential Portfolio Segment [Member] | Nonperforming Financial Instruments [Member]
Loans	$ 0	$ 0

X

- Definition

Amount of financing receivable on nonaccrual status.

+ 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 http://asc.fasb.org/extlink&oid=121611835&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 http://asc.fasb.org/extlink&oid=121599337&loc=SL82919258-210447

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- 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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-Topic 310
-SubTopic 10
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