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Income Taxes (Loss Before Provision For Income Taxes) (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 $ (32,738) $ (18,270)
Domestic Tax Authority [Member]    
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest (32,873) (18,321)
Foreign Tax Authority [Member]    
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest $ 135 $ 51