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PENSION PLAN (Details) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Defined Benefit Plan Disclosure [Line Items]    
Total cost of benefit $ 18 $ 16
Selling, General and Administrative [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Current service cost, net of employee contributions 17 14
Other Expense [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Interest cost on accrued benefit obligation 25 25
Expected return on plan assets (43) (40)
Amortization of transitional obligation 3 3
Amortization of past service costs 2 2
Amortization of net actuarial gain $ 14 $ 12