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Note 4 - Credit Quality - Loans Modified as Troubled Debt Restructurings by Loan Class and Accrual Status (Details) - USD ($) $ in Thousands | Sep. 30, 2018 | Dec. 31, 2017
--- | --- | ---
Nonaccrual | [1] | $ 2,213 | $ 1,929
Accrual |  | 7,142 | 7,734
TDRs |  | 9,355 | 9,663
Allowance for loan losses related to TDRs |  | 632 | 642
Commercial Portfolio Segment [Member] | Single Family Non-owner Occupied [Member] |  |  |
Nonaccrual | [1] | 332 | 364
Accrual |  | 311 | 528
TDRs |  | 643 | 892
Commercial Portfolio Segment [Member] | Non-farm, Non-residential [Member] |  |  |
Nonaccrual | [1] |  |
Accrual |  | 315 | 295
TDRs |  | 315 | 295
Consumer Real Estate Portfolio Segment [Member] | Home Equity Lines [Member] |  |  |
Nonaccrual | [1] |  |
Accrual |  | 130 | 145
TDRs |  | 130 | 145
Consumer Real Estate Portfolio Segment [Member] | Single Family Owner Occupied [Member] |  |  |
Nonaccrual | [1] | 1,881 | 1,565
Accrual |  | 6,124 | 6,496
TDRs |  | 8,005 | 8,061
Consumer Real Estate Portfolio Segment [Member] | Owner Occupied Construction [Member] |  |  |
Nonaccrual | [1] |  |
Accrual |  | 227 | 233
TDRs |  | 227 | 233
Consumer and Other Portfolio Segment [Member] |  |  |
TDRs |  |  | 37
Consumer and Other Portfolio Segment [Member] | Consumer Loans [Member] |  |  |
Nonaccrual | [1] |  |
Accrual |  | 35 | $ 37
TDRs |  | $ 35 |
[1] | Nonaccrual TDRs are included in total nonaccrual loans disclosed in the nonaccrual table above.

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