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CONCENTRATION OF CREDIT RISK AND MAJOR CUSTOMERS (Details)
3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Jun. 30, 2019
Jun. 30, 2018
Dec. 31, 2018
Revenues [Member] | One Major Customers [Member]          
Concentration Risk [Line Items]          
Concentration risk percentage 16.20% 16.30% 15.30% 18.20%  
Accounts Receivable [Member] | Two Major Customers [Member]          
Concentration Risk [Line Items]          
Concentration risk percentage     29.00%   41.30%