Sale of Assets - Additional Information (Detail) (USD $)	1 Months Ended	9 Months Ended	12 Months Ended
	Jan. 31, 2013 Well Mcfe	Sep. 30, 2013	Dec. 31, 2012 Mcfe
Property Plant And Equipment [Abstract]
Sale of interests in non-core assets	$ 2,625,000
Retained an overriding royalty interest	2.50%	2.50%
Number of wellbores operator assumed	300
Production of wells mcfe per day			800
Overriding royalty interest retained		5.00%
Impairment loss on shallow well assets			10,132,702
Loss on sale of asset		$ (8,787)