Income Taxes (Income (Loss) Before Income Taxes) (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Taxes [Abstract]
Domestic	$ (63,660)	$ (49,851)	$ (46,971)
Loss from operations, before income taxes	$ (63,660)	$ (49,851)	$ (46,971)

Amount of income (loss) from continuing operations, including income (loss) from equity method investments, before deduction of income tax expense (benefit), and income (loss) attributable to noncontrolling interest.

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