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Note 8 - Loans Receivable and Credit Disclosures - Allowance for Loan Losses Impairment Analysis (Details) - USD ($) $ in Thousands | Sep. 30, 2020 | Dec. 31, 2019
--- | --- | ---
Individually evaluated for impairment | $ 223 | $ 209
Collectively evaluated for impairment | 15,709 | 12,410
Balance | 15,932 | 12,619
Construction Real Estate [Member] |  |
Individually evaluated for impairment | 0 | 0
Collectively evaluated for impairment | 744 | 672
Balance | 744 | 672
Family Residential Real Estate 1-4 [Member] |  |
Individually evaluated for impairment | 150 | 209
Collectively evaluated for impairment | 2,436 | 1,913
Balance | 2,586 | 2,122
Commercial Real Estate Portfolio Segment [Member] |  |
Individually evaluated for impairment | 0 | 0
Collectively evaluated for impairment | 7,448 | 5,362
Balance | 7,448 | 5,362
Agriculture Real Estate [Member] |  |
Individually evaluated for impairment | 0 | 0
Collectively evaluated for impairment | 1,698 | 1,326
Balance | 1,698 | 1,326
Commercial Portfolio Segment [Member] |  |
Individually evaluated for impairment | 2 | 0
Collectively evaluated for impairment | 1,414 | 1,458
Balance | 1,416 | 1,458
Agriculture [Member] |  |
Individually evaluated for impairment | 41 | 0
Collectively evaluated for impairment | 1,727 | 1,478
Balance | 1,768 | 1,478
Consumer and Other [Member] |  |
Individually evaluated for impairment | 30 | 0
Collectively evaluated for impairment | 242 | 201
Balance | $ 272 | $ 201

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- Definition Amount of allowance for credit loss on financing receivable. Excludes allowance for financing receivable covered under loss sharing agreement. + 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 (c)(1) -URI http://asc.fasb.org/extlink&oid=121611835&loc=SL6953423-111524 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(7)(2)) -URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=121599878&loc=SL82895884-210446 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 13 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=121599337&loc=SL82919249-210447 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 13 -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=121599337&loc=SL82919249-210447 + Details
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- Definition The valuation allowance for financing receivables that are expected to be uncollectible 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 (g) -URI http://asc.fasb.org/extlink&oid=121611835&loc=SL6953423-111524 + Details
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- Definition Amount of valuation allowance for financing receivables that are expected to be uncollectible 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 (g) -URI http://asc.fasb.org/extlink&oid=121611835&loc=SL6953423-111524 + Details
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