Income Tax (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Summary of Pre-tax income in jurisdictions
Pre-tax income	$ 18,359	$ 21,843
PRC [Member]
Summary of Pre-tax income in jurisdictions
Pre-tax income	18,460	21,968
BVI [Member]
Summary of Pre-tax income in jurisdictions
Pre-tax income	(91)	(115)
Others [Member]
Summary of Pre-tax income in jurisdictions
Pre-tax income	$ (10)	$ (10)