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Note 4 - Credit Quality - Loans Modified as Troubled Debt Restructurings by Loan Class and Accrual Status (Details) - USD ($)
$ in Thousands
Mar. 31, 2019
Dec. 31, 2018
Nonaccrual [1] $ 2,863 $ 2,581
Accrual 6,489 6,427
TDRs 9,352 9,008
Allowance for loan losses related to TDRs 481 568
Commercial Portfolio Segment [Member] | Construction, Development and Other Land [Member]    
Nonaccrual
Accrual
TDRs
Commercial Portfolio Segment [Member] | Single Family Non-owner Occupied [Member]    
Nonaccrual [1] 638 640
Accrual 610 309
TDRs 1,248 949
Commercial Portfolio Segment [Member] | Non-farm, Non-residential [Member]    
Nonaccrual [1]
Accrual 313 314
TDRs 313 314
Consumer Real Estate Portfolio Segment [Member] | Home Equity Lines [Member]    
Nonaccrual [1] 4
Accrual 123 127
TDRs 127 127
Consumer Real Estate Portfolio Segment [Member] | Single Family Owner Occupied [Member]    
Nonaccrual [1] 2,221 1,941
Accrual 5,185 5,417
TDRs 7,406 7,358
Consumer Real Estate Portfolio Segment [Member] | Owner Occupied Construction [Member]    
Nonaccrual [1]
Accrual 224 225
TDRs 224 225
Consumer and Other Portfolio Segment [Member]    
TDRs   35
Consumer and Other Portfolio Segment [Member] | Consumer Loans [Member]    
Nonaccrual [1]
Accrual 34 $ 35
TDRs $ 34  
[1] Nonaccrual TDRs are included in total nonaccrual loans disclosed in the nonaccrual table above.