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Asset Retirement Obligation (Details) (USD $)	12 Months Ended
Asset Retirement Obligation (Details) (USD $)	Dec. 31, 2012	Dec. 31, 2011
Asset Retirement Obligations [Abstract]
Asset Retirement Obligation, Beginning Balance	$ 2,067,700	$ 1,880,500
Accretion expense	105,400	112,800
Revisions	(71,200)	74,400
Asset Retirement Obligation, Ending Balance	$ 2,101,900	$ 2,067,700

The carrying amount of a liability for an asset retirement obligation. An asset retirement obligation is a legal obligation associated with the disposal or retirement of a tangible long-lived asset that results from the acquisition, construction or development, or the normal operations of a long-lived asset, except for certain obligations of lessees.

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- Definition

Amount of accretion expense recognized during the period that is associated with an asset retirement obligation. Accretion expense measures and incorporates changes due to the passage of time into the carrying amount of the liability.

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