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INCOME TAXES - Deferred Income Tax Classification (Details) - USD ($)
$ in Thousands
Dec. 31, 2018
Dec. 31, 2017
Income Tax Disclosure [Abstract]    
Deferred tax assets, net $ 1,928 $ 4,239
Deferred tax liabilities 3 1,147
Net deferred tax assets $ 1,925 $ 3,092