Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Income Taxes [Abstract]
Income tax benefit	$ 0	$ 0	$ 0	$ 0
Net (loss)/income before income taxes	$ (20,472)	$ (36,493)	$ (35,198)	$ (32,394)
Federal statutory tax rate			21.00%

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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