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Basis of Financial Statement Presentation and Significant Accounting Policies - Changes to Asset Retirement Obligations (Detail) - USD ($)
9 Months Ended
Sep. 30, 2016
Sep. 30, 2015
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward]    
Asset retirement obligations at beginning of period $ 39,669 $ 90,928
Liabilities incurred during the period 28,777 34,116
Accretion expense 8,339 3,000
Asset retirement obligations at end of period $ 76,785 $ 128,044