Unaudited Condensed Statements of Comprehensive (Loss) Income - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Statements of Other Comprehensive Income [Abstract]
Net (loss) income	$ (218,389)	$ (9,155)	$ 365,853	$ 443,292
Other comprehensive (loss) income:
Interest rate swaps, before taxes	(13,244)	(47,213)	2,491	(148,891)
Income tax applicable to interest rate swaps	4,768	16,996	(897)	53,601
Other comprehensive (loss) income, net of taxes	(8,476)	(30,217)	1,594	(95,290)
Total comprehensive (loss) income	$ (226,865)	$ (39,372)	$ 367,447	$ 348,002