XML 51 R37.htm IDEA: XBRL DOCUMENT v3.24.1.u1

PLANT AND EQUIPMENT AND MINERAL PROPERTIES - Schedule of Summary of Mineral Properties (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Property, Plant and Equipment [Line Items]
Mineral Properties total	$ 122,406	$ 119,581
Sheep Mountain
Property, Plant and Equipment [Line Items]
Mineral Properties total	34,183	34,183
Bahia Project
Property, Plant and Equipment [Line Items]
Mineral Properties total	29,130	29,130
Nichols Ranch ISR Project
Property, Plant and Equipment [Line Items]
Mineral Properties total	25,974	25,974
Roca Honda
Property, Plant and Equipment [Line Items]
Mineral Properties total	22,095	22,095
Pinyon Plain
Property, Plant and Equipment [Line Items]
Mineral Properties total	9,337	6,512
Other
Property, Plant and Equipment [Line Items]
Mineral Properties total	$ 1,687	$ 1,687

X

- Definition

Mineral properties, net of adjustments.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-SubTopic 10
-Topic 360
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482099/360-10-50-1

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 932
-SubTopic 360
-Name Accounting Standards Codification
-Section 25
-Paragraph 7
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482479/932-360-25-7

+ Details

Name:	us-gaap_MineralPropertiesNet
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
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

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

X

- Details

Name:	efr_MineralPropertiesAxis=efr_SheepMountainMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	efr_MineralPropertiesAxis=efr_BahiaProjectMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	efr_MineralPropertiesAxis=efr_UranerzISRPropertiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	efr_MineralPropertiesAxis=efr_RocaHondaMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	efr_MineralPropertiesAxis=efr_PinyonPlainMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	efr_MineralPropertiesAxis=efr_OtherMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: