Asset Retirement Obligations (Schedule of Asset Retirement Obligations) (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Asset Retirement Obligations, Roll Forward Analysis [Roll Forward]
Asset retirement obligation at beginning of period	$ 4,013,200	$ 2,610,000	$ 3,901,600	$ 2,535,000
Accretion expense	55,800	37,600	167,400	112,900
Asset retirement obligations settled				(300)
Asset retirement obligation at end of period	$ 4,069,000	$ 2,647,600	$ 4,069,000	$ 2,647,600