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Income Taxes - Schedule of Loss Before Income Taxes (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Income Tax Disclosure [Abstract]    
U.S. $ (17,179) $ 265
Non - U.S. (11,869) (23,766)
Total $ (29,048) $ (23,501)