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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) - USD ($)
$ in Thousands
Sep. 30, 2019
Jan. 01, 2019
Dec. 31, 2018
Property, Plant and Equipment [Line Items]      
Operating lease right-of-use assets $ 8,051   $ 0
Operating lease liabilities $ 8,125    
Accounting Standards Update 2016-02      
Property, Plant and Equipment [Line Items]      
Operating lease right-of-use assets   $ 8,600  
Operating lease liabilities   $ 8,600