Statements of Operations and Accumulated Earnings (Unaudited) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Income Statement [Abstract]
Revenues	$ 4,395,560	$ 3,432,437	$ 24,337,333	$ 24,367,351
Costs and expenses:
Operating costs	4,509,610	4,118,931	18,857,266	18,680,815
Sales and marketing	562,556	447,130	1,758,606	1,685,043
General and administrative	730,385	694,380	2,347,340	1,781,285
Depreciation	489,246	420,636	1,439,119	1,252,860
Total costs and expenses	6,291,797	5,681,077	24,402,331	23,400,003
Net operating (loss) income before other income (expenses)	(1,896,237)	(2,248,640)	(64,998)	967,348
Other income (expenses)
Other income	402,291		416,212	49,907
Interest expense	(84,140)	(59,254)	(243,489)	(174,543)
Total other expenses, net	318,151	(59,254)	172,723	(124,636)
Net (loss) income	(1,578,086)	(2,307,894)	107,725	842,712
Accumulated earnings at beginning of period	3,159,391	5,221,085	1,473,580	2,070,479
Accumulated earnings at end of period	$ 1,581,305	$ 2,913,191	$ 1,581,305	$ 2,913,191