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Income Taxes - Schedule of Income (Loss) Before Income Taxes Attributed to Geographic Locations (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Income Tax Disclosure [Abstract]    
United States $ (18,218) $ (76,256)
Foreign 0 (77)
Net loss before provision for income taxes $ (18,218) $ (76,333)