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Income Taxes - Components of (loss) income before income taxes (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Income Tax Disclosure [Abstract]    
United States $ (19,092) $ (9,820)
Other Countries (113) (159)
Loss before provision for income taxes $ (19,205) $ (9,979)