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Basis of Financial Statement Presentation and Significant Accounting Policies - Changes to Asset Retirement Obligations (Detail) - USD ($)
6 Months Ended
Jun. 30, 2015
Jun. 30, 2014
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward]    
Asset retirement obligations at beginning of period $ 90,928 $ 41,440
Liabilities incurred during the period 22,744 22,744
Accretion expense 2,000 2,000
Asset retirement obligations at end of period $ 115,672 $ 66,184