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TRADE AND OTHER RECEIVABLES (Details) - USD ($) $ in Thousands	Jun. 30, 2026	Dec. 31, 2025
Receivables [Abstract]
Trade receivables	$ 13,111	$ 15,993
Tax receivables	1,928	2,025
Other	32	0
Receivables, Net	$ 15,071	$ 18,018

X

- Definition

Other Receivables, After Allowance For Credit Loss, Current

+ References

No definition available.

+ Details

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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

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

X

- References

No definition available.

+ Details

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