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Income Taxes (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Income Taxes Details Abstract      
Domestic $ (15,599) $ (21,784) $ (24,728)
Foreign 55 104 130
Income loss before taxes $ (15,544) $ (21,680) $ (24,598)