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Notes Payable (NPI Agreement) - Additional Information (Detail) - USD ($)		3 Months Ended	6 Months Ended
	Apr. 27, 2015	Jun. 30, 2015	Jun. 30, 2015	Jun. 30, 2014
Debt Instrument [Line Items]
Contingent borrowing capacity		$ 47,500,000	$ 47,500,000
Morgan Stanley [Member]
Debt Instrument [Line Items]
Contingent borrowing capacity		47,500,000	$ 47,500,000
Net Profits Interest Agreement [Member]
Debt Instrument [Line Items]
Percentage of net profit related to NPI			6.50%
Percentage of net profit for subsequent borrowing			2.50%
Percentage of NPI earned	2.53%		1.00%
Net Profits Interest Agreement [Member] \| Tranche B [Member]
Debt Instrument [Line Items]
Contingent borrowing capacity	$ 47,500,000
Net Profits Interest Agreement [Member] \| Minimum [Member]
Debt Instrument [Line Items]
Minimum amount of NPI earned			$ 1,500,000
Net Profits Interest Agreement [Member] \| American Shale [Member]
Debt Instrument [Line Items]
Agreed amount to pay dues	13,800,000
Net Profits Interest Agreement [Member] \| Morgan Stanley [Member]
Debt Instrument [Line Items]
Discount related to NPI				$ 4,072,410
Accretion of discount related to the NPI		$ 222,131	$ 444,262
Net Profits Interest Agreement [Member] \| Morgan Stanley [Member] \| Proved Property [Member]
Debt Instrument [Line Items]
Discount related to NPI				3,339,376
Net Profits Interest Agreement [Member] \| Morgan Stanley [Member] \| Unproved Property [Member]
Debt Instrument [Line Items]
Discount related to NPI				$ 733,034
Net Profits Interest Agreement [Member] \| Successor [Member] \| Tranche B [Member]
Debt Instrument [Line Items]
Contingent borrowing capacity	$ 10,000,000