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Note 4 - Loans and Allowance for Loan Losses - Loans Modified in a Troubled Debt Restructuring (Details) $ in Thousands | 9 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2017 USD ($) | Dec. 31, 2016 USD ($)
Number of loans | 7 | 8
Pre- modification outstanding principal balance | $ 594 | $ 2,447
Post- modification principal balance | $ 393 | $ 1,664
Real Estate [Member] | Construction, Land Development and Other Land Loans [Member] |  |
Number of loans | 1 | 2
Pre- modification outstanding principal balance | $ 107 | $ 1,960
Post- modification principal balance | $ 84 | $ 1,286
Real Estate [Member] | Secured by 1-4 Family Residential Properties [Member] |  |
Number of loans | 3 | 3
Pre- modification outstanding principal balance | $ 318 | $ 318
Post- modification principal balance | $ 188 | $ 249
Real Estate [Member] | Secured by Non-farm, Non-residential Properties [Member] |  |
Number of loans | 1 | 1
Pre- modification outstanding principal balance | $ 53 | $ 53
Post- modification principal balance | $ 38 | $ 41
Commercial and Industrial Loans [Member] |  |
Number of loans | 2 | 2
Pre- modification outstanding principal balance | $ 116 | $ 116
Post- modification principal balance | $ 83 | $ 88

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- Definition Number of financing receivables that have been modified by troubled debt restructurings. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 33 -URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953676-111524 + Details
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