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Note 3 - Loans and Allowance for Loan Losses - Nonperforming Loans (Details) - USD ($) | Sep. 30, 2021 | Dec. 31, 2020
--- | --- | ---
Loans past due 90 days or more still accruing interest | $ 0 | $ 0
Commercial Portfolio Segment [Member] |  |
Loans past due 90 days or more still accruing interest | 0 | 0
Commercial Portfolio Segment [Member] | Commercial and Industrial [Member] |  |
Loans past due 90 days or more still accruing interest | 0 | 0
Commercial Portfolio Segment [Member] | Vacant Land and Land Development and Residential Construction Loan [Member] |  |
Loans past due 90 days or more still accruing interest | 0 | 0
Commercial Portfolio Segment [Member] | Real Estate Owner Occupied Loan [Member] |  |
Loans past due 90 days or more still accruing interest | 0 | 0
Commercial Portfolio Segment [Member] | Real Estate Non Owner Occupied Loan [Member] |  |
Loans past due 90 days or more still accruing interest | 0 | 0
Commercial Portfolio Segment [Member] | Real Estate Multi Family and Residential Rental Loan [Member] |  |
Loans past due 90 days or more still accruing interest | 0 | 0
Retail Portfolio Segment [Member] |  |
Loans past due 90 days or more still accruing interest | 0 | 0
Retail Portfolio Segment [Member] | Home Equity and Other [Member] |  |
Loans past due 90 days or more still accruing interest | 0 | 0
Retail Portfolio Segment [Member] | One to Four Family Mortgages [Member] |  |
Loans past due 90 days or more still accruing interest | 0 | 0
Nonperforming Financial Instruments [Member] |  |
Loans past due 90 days or more still accruing interest | 0 | 0
Nonaccrual loans | 2,766,000 | 3,384,000
Total nonperforming loans | 2,766,000 | 3,384,000
Nonperforming Financial Instruments [Member] | Commercial Portfolio Segment [Member] |  |
Total nonperforming loans | 673,000 | 813,000
Nonperforming Financial Instruments [Member] | Commercial Portfolio Segment [Member] | Commercial and Industrial [Member] |  |
Total nonperforming loans | 673,000 | 172,000
Nonperforming Financial Instruments [Member] | Commercial Portfolio Segment [Member] | Vacant Land and Land Development and Residential Construction Loan [Member] |  |
Total nonperforming loans | 0 | 0
Nonperforming Financial Instruments [Member] | Commercial Portfolio Segment [Member] | Real Estate Owner Occupied Loan [Member] |  |
Total nonperforming loans | 0 | 619,000
Nonperforming Financial Instruments [Member] | Commercial Portfolio Segment [Member] | Real Estate Non Owner Occupied Loan [Member] |  |
Total nonperforming loans | 0 | 22,000
Nonperforming Financial Instruments [Member] | Commercial Portfolio Segment [Member] | Real Estate Multi Family and Residential Rental Loan [Member] |  |
Total nonperforming loans | 0 | 0
Nonperforming Financial Instruments [Member] | Retail Portfolio Segment [Member] |  |
Total nonperforming loans | 2,093,000 | 2,571,000
Nonperforming Financial Instruments [Member] | Retail Portfolio Segment [Member] | Home Equity and Other [Member] |  |
Total nonperforming loans | 142,000 | 242,000
Nonperforming Financial Instruments [Member] | Retail Portfolio Segment [Member] | One to Four Family Mortgages [Member] |  |
Total nonperforming loans | $ 1,951,000 | $ 2,329,000

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- Definition Amount of financing receivable 90 days or more past due and still accruing. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 16 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=124255953&loc=SL82919258-210447 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 7 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=123577603&loc=d3e5111-111524 Reference 3: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 55 -Paragraph 80 -URI http://asc.fasb.org/extlink&oid=124267575&loc=SL82922355-210448 + Details
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