Number of milestones during development process under the funding agreement.

No definition available.

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Period Type:	duration

- Definition

Percentage of actual expenses from the invoices that are conditional as a part of grant from Wyoming Energy Authority.

+ References

No definition available.

+ Details

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Namespace Prefix:	reemf_
Data Type:	dtr-types:percentItemType
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- Definition

The actual expenses kept as retainer for grant from Wyoming Energy Authority.

+ References

No definition available.

+ Details

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Namespace Prefix:	reemf_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Carrying amount as of the balance sheet date of amounts due under the terms of governmental, corporate, or foundation grants.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(3)(a)(4))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Carrying amount as of the balance sheet date of amounts due under the terms of governmental, corporate, or foundation grants. For classified balance sheets, represents the current amount receivable, that is amounts expected to be collected within one year or the normal operating cycle, if longer.

+ References

+ Details

Name:	us-gaap_GrantsReceivableCurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Carrying amount due after one year of the balance sheet date (or one operating cycle, if longer) of amounts due under the terms of governmental, corporate, or foundation grants.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(17))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Details

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Namespace Prefix:
Data Type:	na
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Period Type:

- Details

Name:	us-gaap_TypeOfArrangementAxis=reemf_FundingAgreementMember
Namespace Prefix:
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WYOMING ENERGY AUTHORITY GRANT (Details) $ in Thousands	1 Months Ended
WYOMING ENERGY AUTHORITY GRANT (Details) $ in Thousands	Jun. 30, 2023 USD ($) Milestone	Dec. 31, 2023 USD ($)	Oct. 01, 2021 USD ($)
Grant receivable, current		$ 2,000
Grants receivable			$ 4,400
Wyoming Energy Authority
Grant receivable, current		2,000
Grants receivable, noncurrent		2,400
Grants receivable		$ 4,400
Wyoming Energy Authority \| Funding Agreement
Grants receivable	$ 4,400
Number of milestones during development process \| Milestone	2
Percentage of actual expenses	10.00%
Retainer amount	$ 440