Supplementary Financial Information (Details) (USD $)	3 Months Ended								12 Months Ended
	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012
Supplementary Financial Information [Abstract]
Net revenues	$ 10,036,460	$ 14,274,459	$ 13,280,950	$ 9,144,568	$ 10,100,168	$ 13,787,685	$ 11,964,084	$ 9,608,710	$ 46,736,437	$ 45,460,647
Operating expenses	9,415,308	13,999,754	12,948,626	8,638,940	9,238,582	13,401,106	12,257,434	8,603,751	45,002,628	43,500,873
Net income	$ 361,880	$ 170,503	$ 193,248	$ 291,081	$ 448,362	$ 202,034	$ (166,536)	$ 532,504	$ 1,016,712	$ 1,016,364
Basic net income per share	$ 0.09	$ 0.04	$ 0.05	$ 0.07	$ 0.11	$ 0.05	$ (0.04)	$ 0.13	$ 0.24	$ 0.25
Diluted net income per share	$ 0.09	$ 0.04	$ 0.05	$ 0.07	$ 0.11	$ 0.05	$ (0.04)	$ 0.13	$ 0.24	$ 0.24