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Note 8 - Loans Receivable and Credit Disclosures - Loans Receivable Impairment Analysis (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Individually evaluated for impairment	$ 17,712	$ 4,788
Collectively evaluated for impairment	1,076,939	1,056,058
Balance	1,094,651	1,060,846
Construction Real Estate [Member]
Individually evaluated for impairment
Collectively evaluated for impairment	49,768	47,895
Balance	49,768	47,895
Family Residential Real Estate 1-4 [Member]
Individually evaluated for impairment	1,198	1,204
Collectively evaluated for impairment	203,593	200,306
Balance	204,791	201,510
Commercial Real Estate Portfolio Segment [Member]
Individually evaluated for impairment	11,594	83
Collectively evaluated for impairment	449,911	435,767
Balance	461,505	435,850
Agriculture Real Estate [Member]
Individually evaluated for impairment	794	84
Collectively evaluated for impairment	161,190	160,687
Balance	161,984	160,771
Commercial Portfolio Segment [Member]
Individually evaluated for impairment	580	462
Collectively evaluated for impairment	85,163	83,622
Balance	85,743	84,084
Agriculture [Member]
Individually evaluated for impairment	3,462	2,951
Collectively evaluated for impairment	108,944	108,994
Balance	112,406	111,945
Consumer and Other [Member]
Individually evaluated for impairment	84	4
Collectively evaluated for impairment	18,370	18,787
Balance	$ 18,454	$ 18,791

X

- Definition

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

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 11B
-Subparagraph (h)
-URI http://asc.fasb.org/extlink&oid=121611835&loc=SL6953423-111524

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X

- Definition

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

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 11B
-Subparagraph (h)
-URI http://asc.fasb.org/extlink&oid=121611835&loc=SL6953423-111524

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X

- 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

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=121593590&loc=d3e4428-111522

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