Asset Retirement Obligation (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Asset Retirement Obligation [Abstract]
Asset retirement obligation at beginning of period	$ 3,053,100	$ 2,985,500	$ 2,972,300	$ 2,911,300
Accretion expense	40,400	37,100	121,200	111,300
Asset retirement obligation at end of period	$ 3,093,500	$ 3,022,600	$ 3,093,500	$ 3,022,600