XML 74 R59.htm IDEA: XBRL DOCUMENT v3.19.2

RELATED PARTY TRANSACTIONS (Details) - USD ($)	1 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2016	Jun. 30, 2019	Dec. 31, 2017	Dec. 31, 2018
Related Party Transaction [Line Items]
Common stock, shares, outstanding (in shares)	95,551,357		95,551,357		91,445,066
Testing permit and lease option agreement, payments			$ 1,030,000
Testing permit and lease option agreement, accrued liability	$ 1,350,000		1,350,000
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			$ 0	$ 0
Director
Related Party Transaction [Line Items]
Equity method, ownership percentage	81.00%		81.00%
Proceeds from contributed capital			$ 50,000
Mestena Sellers
Related Party Transaction [Line Items]
Common stock, shares, outstanding (in shares)	4,247,570		4,247,570
Leoncito Project, L.L.C. | Director
Related Party Transaction [Line Items]
Common stock, shares, outstanding (in shares)		168,486
Testing permit and lease option agreement, payments			$ 510,000
Amount paid in common stock			510,000
Testing permit and lease option agreement, accrued liability	$ 180,000		180,000
Leoncito Project, L.L.C. | The Grantors
Related Party Transaction [Line Items]
Common stock, shares, outstanding (in shares)		97,786
Testing permit and lease option agreement, payments	600,000
Amount paid in common stock		$ 300,000
Testing permit and lease option agreement, percentage that may be paid in common shares		50.00%
Testing permit and lease option agreement, accrued liability	$ 300,000		$ 300,000
Mesteña LLC | Director
Related Party Transaction [Line Items]
Shares issued for acquisition of Royalties (in shares)		4,551,284
United Nuclear | Director
Related Party Transaction [Line Items]
Equity method, ownership percentage	19.00%		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

Testing Permit and Lease Option Agreement, Accrued Liability

+ References

No definition available.

+ Details

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

X

- Definition

Testing Permit and Lease Option Agreement, Payments

+ References

No definition available.

+ Details

Name:	efr_TestingPermitandLeaseOptionAgreementPayments
Namespace Prefix:	efr_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Testing Permit and Lease Option Agreement, Payments Made In Common Stock

+ References

No definition available.

+ Details

Name:	efr_TestingPermitandLeaseOptionAgreementPaymentsMadeInCommonStock
Namespace Prefix:	efr_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Testing Permit and Lease Option Agreement, Percentage that May Be Paid in Common Shares

+ References

No definition available.

+ Details

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

X

- Definition

Number of shares of common stock outstanding. Common stock represent the ownership interest in a corporation.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21463-112644

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(29))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

Name:	us-gaap_CommonStockSharesOutstanding
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

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=109223946&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=109223946&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

- Definition

Number of shares of stock issued during the period pursuant to acquisitions.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(29))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.3-04)
-URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(28))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

Name:	us-gaap_StockIssuedDuringPeriodSharesAcquisitions
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

X

- Details

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

X

- Details

Name:	srt_CounterpartyNameAxis=efr_MestenaSellersMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_CounterpartyNameAxis=efr_LeoncitoProjectL.L.C.Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

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

X

- Details

Name:	us-gaap_BusinessAcquisitionAxis=efr_MesteaLLCMember
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: