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Income Taxes - Summary of Difference Between Effective Income Tax Rate Determined by Applying Statutory Income Tax Rate (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Summary of difference between effective income tax rate determined by applying statutory income tax rate
(Provision for) benefit from U.S federal statutory rate	$ 2,385	$ 736
Effect of state income taxes	51	32
Non-deductible business meals and entertainment expenses	(11)	(16)
Foreign income taxes included in equity in earnings	140	269
Accrual to return adjustments and other	81	(653)
Change in valuation allowance	(2,690)	(796)
Total expense	$ (44)	$ (428)

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Income tax reconciliation accrual to return adjustments and other.

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Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to increase (decrease) in the valuation allowance for deferred tax assets.

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Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to foreign income tax expense (benefit).

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