Notes Payable - Additional Information (Detail) (USD $)	3 Months Ended	12 Months Ended	0 Months Ended				3 Months Ended			3 Months Ended			3 Months Ended		3 Months Ended
	Mar. 31, 2014	Dec. 31, 2013	Apr. 02, 2012 CIT Capital USA Inc. [Member]	Mar. 31, 2014 CIT Capital USA Inc. [Member]	Mar. 31, 2013 CIT Capital USA Inc. [Member]	Jun. 22, 2007 CIT Capital USA Inc. [Member]	Mar. 31, 2014 CIT Capital USA Inc. [Member] Stout #2H, Groves #1H and Lucey #1H [Member]	Mar. 31, 2014 CIT Capital USA Inc. [Member] Marcellus Shale Wells [Member]	Mar. 31, 2014 CIT Capital USA Inc. [Member] Eighth Amendment [Member]	Mar. 31, 2014 ASD Credit Agreement [Member] acre Well	Mar. 31, 2013 ASD Credit Agreement [Member]	Apr. 26, 2012 ASD Credit Agreement [Member]	Mar. 31, 2014 A&R Credit Agreement [Member]	Feb. 28, 2013 A&R Credit Agreement [Member]	Mar. 31, 2014 A&R Credit Agreement [Member]	Mar. 31, 2013 A&R Credit Agreement [Member]	May 21, 2014 Subsequent Event [Member]	May 21, 2014 Subsequent Event [Member] Committed [Member]	May 21, 2014 Subsequent Event [Member] Uncommitted [Member]	May 21, 2014 Subsequent Event [Member] Maximum [Member]
Line of Credit Facility [Line Items]
Financing agreement date				Jun. 22, 2007
Credit facility, face amount						$ 30,000,000				$ 50,000,000		$ 50,000,000								$ 200,000,000
Line of credit, interest rate					1.50%				1.50%
Overriding royalty interest							1.50%	1.50%
Line of credit principal payment			125,000
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	970,588	1,235,294								3,000,000
Administrative fee										50,000
Interest expense on debt	836,459	2,800,000								264,706	264,706				5,600,000
Debt instrument increase borrowing capacity														75,000,000
Interest rate													Interest is due monthly at 10% plus the greater of 1% or the 3 month LIBOR rate		Interest is due monthly at 10% plus the greater of 1% or the 3 month LIBOR rate
Maturity Date													Feb. 28, 2015		Feb. 28, 2015
LIBOR Rate										1.00%			1.00%		1.00%
Debt instrument interest rate										9.00%			10.00%		10.00%
Debt instrument LIBOR Rate													11.00%		11.00%
Debt instruments increase in principal amount													25,000,000
Maximum termination fees on prepayment													12,500,000
Prepayment penalty description													The Termination Fee will be equal to $12.5 million less all interest payments actually made with respect to the $25 million loan prior to such date.		The Termination Fee will be equal to $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	Dec. 31, 2018												Apr. 26, 2014		Apr. 26, 2014
Termination fee liability															6,800,000
Maturity date													Feb. 28, 2015		Feb. 28, 2015
Interest															5,700,000
Amortization expense - Termination Fee Debt Discount	3,104,200	3,940,659													6,784,626
Conversion period - Termination Fee Debt Discount													Feb. 28, 2015		Feb. 28, 2015
Debt instrument percentage of contingent interest on non compliance of debt covenant													1.00%		1.00%
Addition to Principal balance and interest expense	375,000														532,388	2,030,050
Contingent interest amount	617,581
Principal balance of Interest amortization	375,000
Debt financing cost amortization period	3 months
Interest added back to principal	2,186,038
Increase in borrowings										7,500,000
Initial withdrawal amount	102,500,000																102,500,000
Remaining borrowing capacity	$ 47,500,000																	$ 47,500,000	$ 50,000,000