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Income Taxes - Income (Loss) From Continuing Operations Before Income Tax (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest [Abstract]    
United States $ (11,862) $ (22,452)
Foreign (9,904) 2,440
Loss from continuing operations before income tax expense (benefit) $ (21,766) $ (20,012)