Basis of Financial Statement Presentation and Significant Accounting Policies - Changes to Asset Retirement Obligations (Detail) (USD $)	6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Dec. 31, 2012
Asset Retirement Obligation Roll Forward Analysis [Roll Forward]
Asset retirement obligations at beginning of period	$ 41,440	$ 416,322
Liabilities incurred during the period	22,744	0
Accretion expense	2,000	1,840
Liabilities held for sale	0	(388,005)	(388,005)
Asset retirement obligations at end of period	$ 66,184	$ 30,157