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ACCOUNTING PRONOUNCEMENTS (Details) - USD ($)
$ in Thousands
9 Months Ended
Sep. 30, 2019
Sep. 30, 2018
Dec. 31, 2018
Dec. 31, 2017
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
Increase (Decrease) in Prepaid Expense and Other Assets $ (298) $ 202    
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents $ 28,881 $ 38,865 $ 41,060 $ 22,006