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Oil and Gas Properties (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
Oil and Gas Properties (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Oil and Gas Properties [Abstract]
Cash consideration		$ 21,700		$ 21,700
Working interest percentage				6.25%
Proceeds from sale of oil and gas properties				$ 2,748
Carrying value of oil and gas properties at date of sale		100		100
Gain on sale of oil and gas properties		17		2,602
Workover expense		$ (30)	$ (35)	$ 299

Carrying value of oil and gas property at date of sale.

+ References

No definition available.

+ Details

Name:	cik1325703_CarryingValueOfOilAndGasPropertySold
Namespace Prefix:	cik1325703_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

The working interest owned, expressed as a percentage, that an entity has in a particular well(s).

+ References

No definition available.

+ Details

Name:	cik1325703_GasAndOilWorkingInterestPercentage
Namespace Prefix:	cik1325703_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

The total cash consideration for the purchase and sale agreement of the oil and gas properties.

+ References

No definition available.

+ Details

Name:	cik1325703_SaleOfOilAndGasPropertiesCashConsideration
Namespace Prefix:	cik1325703_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Costs to restore or stimulate production of existing reserves of a proved property.

+ References

No definition available.

+ Details

Name:	cik1325703_WorkoverExpenses
Namespace Prefix:	cik1325703_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- References

No definition available.

+ Details

Name:	us-gaap_CostsIncurredAcquisitionOfOilAndGasPropertiesAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of gain (loss) on sale or disposal of proven and unproven oil and gas properties.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 28

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3602-108585

+ Details

Name:	us-gaap_GainLossOnSaleOfOilAndGasProperty
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The cash inflow to dispose of long-lived, physical assets and mineral interests in oil and gas properties used for normal oil and gas operations.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Investing Activities

-URI http://asc.fasb.org/extlink&oid=6516133

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 12

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3179-108585

+ Details

Name:	us-gaap_ProceedsFromSaleOfOilAndGasPropertyAndEquipment
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

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