Income taxes.

No definition available.

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

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

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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 recognized for uncertainty in income taxes classified as noncurrent.

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- Definition

Tax year that remains open to examination under enacted tax laws, in CCYY format.

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Income Taxes - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2018
Income Taxes [Line Items]
Liability for uncertain tax positions	$ 1,000		$ 1,000		$ 1,000
Deferred income taxes on undistributed earnings			(337)	$ (744)
Income tax (benefit) expense	$ (4,149)	$ 1,316	$ (3,308)	$ 5,426
Effective income tax rate	(303.70%)	317.10%	(81.30%)	52.70%
Zhongli [Member]
Income Taxes [Line Items]
Income tax (benefit) expense			$ (4,400)
Foreign Subsidiaries [Member]
Income Taxes [Line Items]
Deferred income taxes on undistributed earnings			$ 400		$ 600
Federal Authorities [Member]
Income Taxes [Line Items]
Open tax years			2014 2015 2016 2017 2018 2019
State and Foreign Authorities [Member]
Income Taxes [Line Items]
Open tax years			2014 2015 2016 2017 2018 2019