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Income Taxes (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Income Taxes [Abstract]    
Domestic $ (18,336) $ (16,260)
Foreign (1,447) (1,821)
Loss from Continuing Operations before Provision for Income Taxes $ (19,783) $ (18,081)