Summary of Significant Accounting Policies - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2014 Segment	Dec. 31, 2013
Summary Of Significant Accounting Policies [Line Items]
Oil and Gas, unit of measure	Natural gas is converted to barrel equivalents, BOE, at the rate of six Mcf of natural gas to one barrel of oil.
Average pricing determination period	12 months
Number of operating segment	1
Common stock exchange price	$ 3.30
Common stock shares issued upon conversion of Convertible preferred stock		33,712
Preferred Stock Series A1
Summary Of Significant Accounting Policies [Line Items]
Convertible preferred stock, liquidation preference		30,303
Gas Gathering System
Summary Of Significant Accounting Policies [Line Items]
Estimated useful life	10 years
Furniture and Equipment
Summary Of Significant Accounting Policies [Line Items]
Estimated useful life	5 years