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Income Taxes - Summary of Income Taxes Expenses (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Deferred tax benefits
Deferred tax benefits	$ (37)		$ (1,087)
Actual income tax benefit	(33)
PRC [Member]
Current tax expense
Current tax expense
Deferred tax benefits
Deferred tax benefits	(37)
HK [Member]
Current tax expense
Current tax expense	4
Deferred tax benefits
Deferred tax benefits

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

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