SELECTED QUARTERLY DATA (Unaudited) (Details) - USD ($)	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Quarterly Financial Data [Abstract]
Net revenues	$ 6,138,867	$ 6,289,839	$ 4,714,975	$ 5,606,454	$ 4,647,648	$ 3,997,319	$ 2,642,056	$ 2,757,601	$ 22,750,135	$ 14,044,624	$ 14,429,782
Operating profit	3,894,516	4,321,958	2,662,974	3,563,867	2,866,214	2,106,911	865,210	1,128,592	14,443,315	6,966,927	7,907,003
Net income	$ 2,658,549	$ 2,870,979	$ 1,757,204	$ 2,330,900	$ 1,919,242	$ 1,394,763	$ 577,966	$ 753,989	$ 9,617,632	$ 4,645,960	$ 5,285,847
Basic earnings per share (in dollars per share)	$ 0.38	$ 0.42	$ 0.26	$ 0.35	$ 0.29	$ 0.21	$ 0.09	$ 0.12	$ 1.41	$ 0.72	$ 0.83
Diluted earnings per share (in dollars per share)	$ 0.36	$ 0.39	$ 0.24	$ 0.32	$ 0.27	$ 0.20	$ 0.08	$ 0.11	$ 1.32	$ 0.66	$ 0.76