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Note 3 - Loans and Allowance for Loan Losses - Credit Risk Profile (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Loans	$ 1,069,668	$ 802,048	$ 409,073
Nonaccrual	6,707	4,687
Agricultural [Member]
Loans	53,735	57,339	49,109
Nonaccrual	348	379
Agricultural [Member] | Pass [Member]
Loans	50,185	55,866
Agricultural [Member] | Special Mention [Member]
Loans	3,202	1,094
Agricultural [Member] | Substandard [Member]
Loans	348	379
Agricultural [Member] | Doubtful [Member]
Loans	0	0
Consumer Portfolio Segment [Member]
Loans	34,014	38,854	24,382
Nonaccrual	8	16
Consumer Portfolio Segment [Member] | Performing Financial Instruments [Member]
Loans	34,006	38,838
Consumer Portfolio Segment [Member] | Nonperforming Financial Instruments [Member]
Loans	0	0
Commercial and Industrial [Member]
Loans	303,527	148,083	91,406
Nonaccrual	1,802	776
Commercial and Industrial [Member] | Pass [Member]
Loans	294,614	146,728
Commercial and Industrial [Member] | Special Mention [Member]
Loans	4,101	1,081
Commercial and Industrial [Member] | Substandard [Member]
Loans	4,812	274
Commercial and Industrial [Member] | Doubtful [Member]
Loans	0	0
Construction Real Estate [Member]
Loans	16,639	13,411	8,843
Nonaccrual	80	0
Construction Real Estate [Member] | Performing Financial Instruments [Member]
Loans	16,559	13,411
Construction Real Estate [Member] | Nonperforming Financial Instruments [Member]
Loans	0	0
Commercial Real Estate Portfolio Segment [Member]
Loans	469,247	326,379	139,453
Nonaccrual	3,088	2,185
Commercial Real Estate Portfolio Segment [Member] | Pass [Member]
Loans	453,080	322,105
Commercial Real Estate Portfolio Segment [Member] | Special Mention [Member]
Loans	6,006	1,332
Commercial Real Estate Portfolio Segment [Member] | Substandard [Member]
Loans	8,925	2,942
Commercial Real Estate Portfolio Segment [Member] | Doubtful [Member]
Loans	1,236	0
Residential Portfolio Segment [Member]
Loans	192,506	217,982	$ 95,880
Nonaccrual	1,381	1,331
Residential Portfolio Segment [Member] | Performing Financial Instruments [Member]
Loans	191,125	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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-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=121593590&loc=d3e4428-111522

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
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-URI http://asc.fasb.org/extlink&oid=121611835&loc=d3e5074-111524

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