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Represents the amount of accumulated depreciation, depletion and amortization relating to oil and gas producing activities.

No definition available.

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Represents the amount of impairment relating to oil and gas producing activities.

No definition available.

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This element represents capitalized costs of proved properties incurred via purchase or development, net of depreciation, depletion and amortization under the full cost method.

No definition available.

Name:	rgeb_ProvedPropertiesNet
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Amount of accretion expense recognized during the period that is associated with an asset retirement obligation. Accretion expense measures and incorporates changes due to the passage of time into the carrying amount of the liability.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 143

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-Publisher FASB

-Name Accounting Standards Codification

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Capitalized costs of proved properties incurred for any combination mineral interests acquisitions; wells and related equipment; support equipment and facilities; and uncompleted wells and equipment and other costs not previously disclosed within this table.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

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-Name Accounting Standards Codification

-Topic 932

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-Glossary Proved Properties

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Development costs incurred, including capitalized costs and costs charged to expense, in oil and gas activities.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

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-Topic 932

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Exploration costs incurred, including capitalized costs and costs charged to expense, in oil and gas activities.

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-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

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Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Exploration

-URI http://asc.fasb.org/extlink&oid=6512329

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The aggregate expense recognized in the current period that allocates the cost of tangible assets, intangible assets, or depleting assets to periods that benefit from use of the assets.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

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Cost incurred related to the upstream oil and gas activities, such as the exploration, development, and production of crude petroleum and natural gas.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

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The expense recorded to reduce the value of oil and gas assets consisting of proved properties and unproved properties as the estimate of future successful production from these properties is reduced.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

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Name:	us-gaap_ImpairmentOfOilAndGasProperties
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Revenue from natural gas production during the reporting period. Natural gas consists largely of the hydrocarbon methane, and is found in underground formations either by itself or with crude oil.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

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Revenue from sale of residue oil and condensate, which normally exists in the reservoir as gas but condenses out as a liquid during production.

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Costs incurred to operate and maintain an entities' wells and related equipment and facilities, including depreciation and applicable operating costs of support equipment and facilities and other costs of operating and maintaining those wells and related equipment and facilities.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

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-Name Accounting Standards Codification

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Name:	us-gaap_OilAndGasProductionExpense
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This element represents the number of barrel of oil equivalents (BOE) which is a measurement used by oil and gas companies as a way of combining oil and natural gas reserves and production into a single measurement. Natural gas volumes are converted to BOE based on the energy content of 6,000 cubic feet of gas to one barrel of oil.

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-Publisher SEC

-Name Industry Guide

-Number 2

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Income before income taxes for oil and gas producing activities.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 932

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