XML 150 R86.htm IDEA: XBRL DOCUMENT v3.21.1

RELATED PARTY TRANSACTIONS (Details) - USD ($)	1 Months Ended	12 Months Ended
	Jun. 30, 2016	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Jun. 30, 2017
Related Party Transaction [Line Items]
Royalty percentage of minerals recovered sold under minimum price threshold	3.125%
Mineral price per pound, low range					$ 65.00
Royalty percentage of minerals recovered sold between price thresholds	6.25%
Mineral price per pound, upper range					$ 95.00
Royalty percentage of minerals recovered sold above maximum price threshold	7.50%
Payments for royalties		$ 300,000
Director
Related Party Transaction [Line Items]
Equity method, ownership percentage		81.00%
Proceeds from contributed capital		$ 130,000	$ 50,000.00	$ 0
Director | United Nuclear
Related Party Transaction [Line Items]
Equity method, ownership percentage		19.00%

X

- Definition

Mineral Price Per Pound, Low Range

+ References

No definition available.

+ Details

Name:	efr_MineralPricePerPoundLowRange
Namespace Prefix:	efr_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Mineral Price Per Pound, Upper Range

+ References

No definition available.

+ Details

Name:	efr_MineralPricePerPoundUpperRange
Namespace Prefix:	efr_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Royalty Percentage of Minerals Recovered, Sold Above Maximum Price Threshold

+ References

No definition available.

+ Details

Name:	efr_RoyaltyPercentageofMineralsRecoveredSoldAboveMaximumPriceThreshold
Namespace Prefix:	efr_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Royalty Percentage of Minerals Recovered, Sold Between Price Thresholds

+ References

No definition available.

+ Details

Name:	efr_RoyaltyPercentageofMineralsRecoveredSoldBetweenPriceThresholds
Namespace Prefix:	efr_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Royalty Percentage of Minerals Recovered, Sold Under Minimum Price Threshold

+ References

No definition available.

+ Details

Name:	efr_RoyaltyPercentageofMineralsRecoveredSoldUnderMinimumPriceThreshold
Namespace Prefix:	efr_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 323
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=114001798&loc=d3e33918-111571

+ Details

Name:	us-gaap_EquityMethodInvestmentOwnershipPercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

X

- Definition

The amount of cash paid for royalties during the current period.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 25
-Subparagraph (g)
-URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3536-108585

+ Details

Name:	us-gaap_PaymentsForRoyalties
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

The cash inflow associated with the amount received by a corporation from a shareholder during the period.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 14
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3255-108585

+ Details

Name:	us-gaap_ProceedsFromContributedCapital
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

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

X

- Details

Name:	us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=srt_DirectorMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	dei_LegalEntityAxis=efr_UnitedNuclearMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: