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Derivative and Hedging Financial Instruments - Summary of Fair Value of Derivatives (Detail) (USD $)	Sep. 30, 2013	Dec. 31, 2012
Derivative [Line Items]
Commodity derivative	$ 464,874
Commodity derivative	57,859
Derivative assets fair value	522,733
Warrant derivative liability	2,213,033	2,808,278
Derivative liabilities fair value	2,213,033	2,808,273
Current Liabilities [Member]
Derivative [Line Items]
Commodity derivative
Noncurrent Liabilities [Member]
Derivative [Line Items]
Commodity derivative
Warrant derivative liability	2,213,033	2,808,278
Current Assets [Member]
Derivative [Line Items]
Commodity derivative	464,874
Noncurrent Assets [Member]
Derivative [Line Items]
Commodity derivative	$ 57,859

Fair value, after the effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets not subject to a master netting arrangement and not elected to be offset.

+ References+ Details

- Definition

Fair value, after the effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets not subject to a master netting arrangement and not elected to be offset.

+ References+ Details