Income Taxes - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Income Tax Disclosure [Abstract]
Income tax expense (benefit)	$ (161)	$ 96	$ (70)	$ 624
Pre-tax loss	(3,434)	(21,398)	(11,952)	(38,258)
Uncertain tax positions, interest or penalties	$ 0	$ 0	$ 0	$ 0

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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