Income Taxes - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Schedule Of Income Taxes [Line Items]
Income tax expenses for continuing operation
Cayman Islands [Member]
Schedule Of Income Taxes [Line Items]
Withholding tax imposed	0.00%
Peoples' Republic of China [Member]
Schedule Of Income Taxes [Line Items]
Withholding tax imposed	10.00%
Effective Income Tax Rate	25.00%
Income tax expenses for continuing operation	0	0	0
Unrecognized Tax Benefits	0	0	0
Interest and penalties related to unrecognized tax benefits were accrued	0	0	0
Statute of limitations, if underpayment of taxes is due to computational errors	3 years
Statute of limitations, under special circumstances, value	$ 15
Statute of limitations, under special circumstances, period	5 years
Statute of limitations, due to transfer pricing issues	10 years

Income Tax Examination Underpayment Of Tax Liability Due To Computational Errors Limitation Period

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- Definition

Income Tax Examination Underpayment Of Tax Liability Due To Special Circumstances Limitation Period

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Income Tax Examination Underpayment Of Tax Liability Due To Transfer Pricing Limitation Period

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Income Tax Examination Underpayment Of Tax Liability Special Circumstance

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- Definition

Percentage Of Withholding Taxes Distribution

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- Definition

A ratio calculated by dividing the reported amount of income tax expense attributable to continuing operations for the period by GAAP-basis pretax income from continuing operations.

+ References

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The sum of the current income tax expense or benefit and the deferred income tax expense or benefit pertaining to pretax Income or Loss from continuing operations; income tax expense or benefit may include interest and penalties on tax uncertainties based on the entity's accounting policy.

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The gross amount of unrecognized tax benefits pertaining to uncertain tax positions taken in tax returns as of the balance sheet date.

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-Glossary Unrecognized Tax Benefit

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- Definition

This element represents the total of accruals as of the date of the statement of financial position for interest recognized for an underpayment of income taxes computed by applying the applicable statutory rate of interest to the difference between a tax position recognized for financial reporting purposes and the amount previously taken or expected to be taken in a tax return of the entity and the amount of statutory penalties for a tax position claimed or expected to be claimed by the entity, in its tax return, that does not meet the minimum statutory threshold to avoid payment of penalties.

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