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BUSINESS SEGMENT, GEOGRAPHIC AND CUSTOMER INFORMATION (Details 1) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Revenues $ 101,390 $ 99,632
United States [Member]    
Revenues 64,923 68,313
Canada [Member]    
Revenues 36,251 31,210
Other Countries [Member]    
Revenues $ 216 $ 109