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PENSION PLAN (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Sep. 30, 2018
Sep. 30, 2017
Defined Benefit Plan Disclosure [Line Items]        
Total cost of benefit $ 15 $ 10 $ 44 $ 37
Selling, General and Administrative [Member]        
Defined Benefit Plan Disclosure [Line Items]        
Current service cost, net of employee contributions 14 10 45 35
Other Expense [Member]        
Defined Benefit Plan Disclosure [Line Items]        
Interest cost on accrued benefit obligation 24 27 74 79
Expected return on plan assets (42) (44) (127) (128)
Amortization of transitional obligation 3 3 6 9
Amortization of past service costs 2 2 4 6
Amortization of net actuarial gain $ 14 $ 12 $ 42 $ 36