Taxation (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Schedule Of Taxation [Line Items]
Current	$ 551,583	$ 456,583	$ 898,520	$ 919,800
Deferred	(142,262)	139,125	(498,878)	263,673
Total income taxes expenses	$ 409,321	$ 595,708	$ 399,642	$ 1,183,473