Notes Payable - Additional Information (Detail) (USD $)	3 Months Ended	12 Months Ended			1 Months Ended	12 Months Ended		12 Months Ended			12 Months Ended		12 Months Ended			12 Months Ended
	Dec. 31, 2013	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2013 ASD Credit Agreement [Member]	Apr. 30, 2012 CIT Capital USA Inc. [Member]	Dec. 31, 2013 CIT Capital USA Inc. [Member]	Jun. 22, 2007 CIT Capital USA Inc. [Member]	Dec. 31, 2013 CIT Capital USA Inc. [Member] Stout #2H, Groves #1H and Lucey #1H [Member]	Dec. 31, 2013 CIT Capital USA Inc. [Member] Marcellus Shale Wells [Member]	Dec. 31, 2013 CIT Capital USA Inc. [Member] Eighth Amendment [Member]	Dec. 31, 2013 A&R Credit Agreement [Member]	Feb. 28, 2013 A&R Credit Agreement [Member]	Dec. 31, 2013 ASD Credit Agreement [Member] acre Well	Dec. 31, 2012 ASD Credit Agreement [Member]	Apr. 26, 2013 ASD Credit Agreement [Member]	Dec. 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
Credit facility, maturity date						Jun. 15, 2010					Feb. 28, 2015					Feb. 28, 2015
Line of credit, interest rate						1.50%				1.50%
Overriding royalty interest								1.50%	1.50%
Productive wells, commercial production period		30 days
Notes payable interest payment due dates description		Payment was due at maturity on June 15, 2010
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	3,000,000	3,000,000
Administrative fee													50,000
Interest expense on debt		2,800,000											1,058,823	705,882		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											10.00%		9.00%			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
Interest		6,016,039	4,044,987													5,700,000
Amortization expense - Termination Fee Debt Discount																6,800,000
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															2,030,050
Contingent interest amount		532,388
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															102,500,000
Remaining borrowing capacity	$ 47,500,000	$ 47,500,000																$ 47,500,000	$ 50,000,000