STATEMENTS OF OPERATIONS AND ACCUMULATED (DEFICIT) EARNINGS - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Income Statement [Abstract]
Revenues	$ 3,491,740	$ 4,276,010	$ 21,926,906	$ 24,049,379
Costs and expenses:
Operating costs	4,172,651	4,754,553	17,789,807	19,034,647
Sales and marketing	390,470	560,583	1,467,987	1,748,326
General and administrative	683,174	743,988	2,122,558	2,190,064
Depreciation	512,646	533,527	1,547,053	1,573,009
Total costs and expenses	5,758,941	6,592,651	22,927,405	24,546,046
Net operating loss before other income (expenses)	(2,267,201)	(2,316,641)	(1,000,499)	(496,667)
Other income (expenses)
Other income	4,148	4,332	14,086	131,390
Interest expense	(105,597)	(139,094)	(328,680)	(369,515)
Total other expenses, net	(101,449)	(134,762)	(314,594)	(238,125)
Net loss	(2,368,650)	(2,451,403)	(1,315,093)	(734,792)
Accumulated (deficit) earnings at beginning of period	(4,337,715)	(1,029,335)	(5,391,272)	(2,745,946)
Accumulated deficit at end of period	$ (6,706,365)	$ (3,480,738)	$ (6,706,365)	$ (3,480,738)