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INCOME TAXES (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2016
Jun. 30, 2015
Jun. 30, 2016
Jun. 30, 2015
Income Tax Disclosure [Abstract]        
Income tax expense (benefit) $ 0 $ (1) $ 0 $ (1)