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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Concentration of Credit Risk) (Details) - USD ($)
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Concentration Risk [Line Items]      
Allowance for Doubtful Accounts Receivable $ 0 $ 0  
Customer Concentration Risk [Member] | Revenues [Member]      
Concentration Risk [Line Items]      
Concentration risk percentage 0.00% 0.00% 0.00%
Customer Concentration Risk [Member] | Accounts Receivables [Member]      
Concentration Risk [Line Items]      
Concentration risk percentage 0.00% 0.00%