Income Tax (Details 2) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Components of income tax expense
Current	$ 121,988	$ 474,871	$ 265,092	$ 978,705
Deferred	199,022	(260,895)	563,191	(85,708)
Income tax expense	$ 321,010	$ 213,976	$ 845,866	$ 892,997