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ACQUISITIONS & DIVESTITURES (Details) - USD ($)	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Business Acquisition [Line Items]
Asset retirement obligation sold	$ (2,934,126)	$ 0
Asset retirement obligations for wells acquired	662,704
Vin Fisher Operating, Inc
Business Acquisition [Line Items]
Cash Consideration	2,000,000
Asset retirement obligations for wells acquired	$ 662,705

X

- Definition

Amount of asset retirement obligations acquired during the period.

+ References

No definition available.

+ Details

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Namespace Prefix:	rei_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Amount of asset retirement obligations properties sold, or otherwise disposed of, during the period. This may include asset retirement obligations transferred to third parties associated with the sale of a long-lived asset.

+ References

No definition available.

+ Details

Name:	rei_AssetRetirementObligationLiabilitiesPropertiesSold
Namespace Prefix:	rei_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Represents the amount received from sale and transfer of wells and leases.

+ References

No definition available.

+ Details

Name:	rei_CashConsideration
Namespace Prefix:	rei_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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

X

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: