Derivative and Hedging Financial Instruments - Summary of Fair Value of Derivatives (Detail) (USD $)	Sep. 30, 2014	Dec. 31, 2013
Derivative [Line Items]
Derivative assets fair value	$ 780,148
Commodity derivative, Current liabilities	217,451	58,176
Commodity derivative, Noncurrent liabilities	831,106	67,597
Derivative liabilities fair value	1,048,557	125,773
Derivative assets fair value
Current Liabilities [Member]
Derivative [Line Items]
Commodity derivative, Current liabilities	217,451	58,176
Noncurrent Liabilities [Member]
Derivative [Line Items]
Commodity derivative, Noncurrent liabilities	831,106	67,597
Current Assets [Member]
Derivative [Line Items]
Commodity derivative, Current assets	780,148
Noncurrent Assets [Member]
Derivative [Line Items]
Commodity derivative, Noncurrent assets

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.

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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, expected to be settled within one year or normal operating cycle, if longer. Includes assets not subject to a master netting arrangement and not elected to be offset.

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- 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 liabilities 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, expected to be settled within one year or normal operating cycle, if longer. 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, expected to be settled after one year or the normal operating cycle, if longer. Includes assets not subject to a master netting arrangement and not elected to be offset.

+ References+ Details