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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Concentration of Credit Risk) (Details) - Customer Concentration Risk [Member]
number in Millions
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Revenues [Member]      
Concentration Risk [Line Items]      
Concentration risk percentage 0.00% 0.00% 0.00%
Accounts Receivables [Member]      
Concentration Risk [Line Items]      
Concentration risk percentage 0.00% 0.00%