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STOCK COMPENSATION EXPENSE (Details) - USD ($)
$ / shares in Units, $ in Thousands
12 Months Ended
Apr. 19, 2017
Mar. 16, 2016
Nov. 01, 2015
Mar. 18, 2015
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Number of shares authorized (in shares)               550,000
Stock based incentive programs over the subsequent years               10 years
Stock option vesting periods         3 years 3 years 3 years  
Stock price volatility calculation base term         3 years      
Compensation expense         $ 217 $ 178 $ 204  
Unrecognized stock-based compensation expense         $ 68      
Unrecognized stock-based compensation, period of recognition         26 months      
2012 Long Term Incentive Plan [Member] | Robert W. Walker [Member] | Stock Options [Member]                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Grants (in shares) 6,000 7,700   7,700        
Fair value of shares granted (in dollars per share) $ 20.70 $ 13.55   $ 13.38        
Compensation expense $ 124 $ 104   $ 103        
2012 Long Term Incentive Plan [Member] | J. Mark Bias [Member] | Stock Options [Member]                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Grants (in shares)     110          
Fair value of shares granted (in dollars per share)     $ 13.63          
Compensation expense     $ 1