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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, 2019
Dec. 31, 2018
Nonaccrual [1] $ 2,522 $ 2,581
Accrual 6,303 6,427
TDRs 8,825 9,008
Allowance for loan losses related to TDRs 356 568
Commercial Portfolio Segment [Member] | Construction, Development and Other Land [Member]    
Nonaccrual [1]
Accrual
TDRs
Commercial Portfolio Segment [Member] | Single Family Non-owner Occupied [Member]    
Nonaccrual [1] 556 640
Accrual 600 309
TDRs 1,156 949
Commercial Portfolio Segment [Member] | Non-farm, Non-residential [Member]    
Nonaccrual [1]
Accrual 309 314
TDRs 309 314
Consumer Real Estate Portfolio Segment [Member] | Home Equity Lines [Member]    
Nonaccrual [1] 3
Accrual 116 127
TDRs 119 127
Consumer Real Estate Portfolio Segment [Member] | Single Family Owner Occupied [Member]    
Nonaccrual [1] 1,963 1,941
Accrual 5,023 5,417
TDRs 6,986 7,358
Consumer Real Estate Portfolio Segment [Member] | Owner Occupied Construction [Member]    
Nonaccrual [1]
Accrual 222 225
TDRs 222 225
Consumer and Other Portfolio Segment [Member]    
TDRs   35
Consumer and Other Portfolio Segment [Member] | Consumer Loans [Member]    
Nonaccrual [1]
Accrual 33 $ 35
TDRs $ 33  
[1] Nonaccrual TDRs are included in total nonaccrual loans disclosed in the nonaccrual table above.