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RECEIVABLES (Details) - USD ($) $ in Thousands	Jun. 30, 2025	Dec. 31, 2024
Receivables [Abstract]
Trade receivables	$ 328	$ 29,019
Tax receivables	7,349	8,744
Other	114	0
Receivables, Net	$ 7,791	$ 37,763

X

- Definition

Other Receivables, After Allowance For Credit Loss, Current

+ References

No definition available.

+ Details

Name:	efr_OtherReceivablesAfterAllowanceForCreditLossCurrent
Namespace Prefix:	efr_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Receivables, Net

+ References

No definition available.

+ Details

Name:	efr_ReceivablesNet
Namespace Prefix:	efr_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Trade Receivables, After Allowance For Credit Loss, Current

+ References

No definition available.

+ Details

Name:	efr_TradeReceivablesAfterAllowanceForCreditLossCurrent
Namespace Prefix:	efr_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

The sum of amounts currently receivable other than from customers. 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

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

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

X

- References

No definition available.

+ Details

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