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FAIR VALUE MEASUREMENTS (Details 1) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2019
Sep. 30, 2018
Sep. 30, 2019
Sep. 30, 2018
Fair Value Disclosures [Abstract]        
Derivative liability, beginning balance     $ 0  
Addition     7,762  
Change in fair value $ (2,747) $ 0 (2,925) $ 0
Derivative liability, ending balance $ 4,837   $ 4,837