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Income Taxes - Components of Provision (Benefit) for Income Taxes by Taxing Authority (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Current provision:
Foreign	$ 291	$ 78
Total current provision	291	78
Deferred benefit:
Federal		(3,033)
Total deferred benefit		(3,033)
Total provision (benefit) for income taxes	$ 291	$ (2,955)

X

- Definition

Amount of current foreign income tax expense (benefit) pertaining to income (loss) from continuing operations.

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