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Note 5 - Loans and Allowance for Loan Losses - Summary of Loans by Class Modified as TDRs (Details) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2020 | Sep. 30, 2019 | Sep. 30, 2020 USD ($) | Sep. 30, 2019
Number of Loans | 1 | 0 | 3 | 1
Pre-Modification Recorded Investment |  |  | $ 1,719 |
Post-Modification Recorded Investment |  |  | $ 1,719 |
Commercial and Industrial Sector [Member] |  |  |  |
Number of Loans |  |  | 3 |
Pre-Modification Recorded Investment |  |  | $ 1,719 |

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- Definition Amount, after troubled debt restructuring, of modified financing receivable. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 33 -URI http://asc.fasb.org/extlink&oid=121611835&loc=SL6953676-111524 + Details
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