Notes Payable (Chambers Credit Agreement) - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2014 acre Well	Dec. 31, 2013	Feb. 28, 2013	Apr. 26, 2012
Line of Credit Facility [Line Items]
Interest expense on debt	$ 1,115,280	$ 0
ASD Credit Agreement, closing date	Dec. 31, 2018
Addition to principal balance and interest expense	375,000
Principal balance of Interest amortization	375,000
Debt financing cost amortization period	3 months
Interest added back to principal	2,186,038
Chambers Credit Agreement [Member]
Line of Credit Facility [Line Items]
Credit facility, face amount			75,000,000	50,000,000
Number of gas wells in which the company owns working interest gross	13
Number of gas wells in which the company owns working interest net	7.60
Marcellus leased properties area	22,000
Original issue discount	6,800,000			3,000,000
Administrative fee	12,500,000			50,000
Interest expense on debt	1,189,400	794,118
Interest rate	Interest was due monthly at 10% plus the greater of 1% or the 3 month LIBOR rate
Maturity Date	Feb. 28, 2015
LIBOR Rate	1.00%
Debt instrument interest rate	10.00%
Debt instrument LIBOR Rate	11.00%
Debt instrument increase in principal amount	25,000,000
Prepayment penalty description	The Termination Fee was defined as $12.5 million less all interest payments actually made with respect to the $25 million loan prior to such date.
ASD Credit Agreement, closing date	Apr. 26, 2014
Increase in borrowings	7,500,000
A&R Credit Agreement [Member]
Line of Credit Facility [Line Items]
Debt instrument percentage of contingent interest on non compliance of debt covenant	100.00%
Addition to principal balance and interest expense	$ 1,149,969	$ 2,030,050