XML 57 R44.htm IDEA: XBRL DOCUMENT v3.5.0.2

CAPITAL STOCK - Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions (Details)	9 Months Ended
	Sep. 30, 2016
Issuance Of Two Five One Five Six Two Five Warrants With Fair Value Of Two Zero Nine Million For March Two Zero One Six
Class of Warrant or Right [Line Items]
Risk-free rate	1.15%
Expected life	3 years
Expected volatility	106.00%
Expected dividend yield	0.00%
Issuance Of Two Five One Five Six Two Five Warrants With Fair Value Of One Six Three Million For June Three Zero Two Zero One Six
Class of Warrant or Right [Line Items]
Risk-free rate	0.29%
Expected life	4 months
Expected volatility	33.30%
Expected dividend yield	0.00%
Issuance Of One Two Two Four Zero Zero Zero Warrants With Fair Value Of Zero Four Zero Million For June Three Zero Two Zero One Six
Class of Warrant or Right [Line Items]
Risk-free rate	0.88%
Expected life	2 years 6 months
Expected volatility	97.60%
Expected dividend yield	0.00%
September 20, 2016 Public Offering
Class of Warrant or Right [Line Items]
Risk-free rate	1.20%
Expected life	5 years
Expected volatility	145.20%
Expected dividend yield	0.00%
September 20, 2016 Public Offering 2
Class of Warrant or Right [Line Items]
Risk-free rate	1.14%
Expected life	5 years
Expected volatility	147.11%
Expected dividend yield	0.00%

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

X

- Definition

The estimated dividend rate (a percentage of the share price) to be paid (expected dividends) to holders of the underlying shares over the expected term of a nonvested share or option award issued to other than an employee.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (f)(2)(iii)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 50
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=51659978&loc=d3e25284-112666

+ Details

Name:	us-gaap_ShareBasedGoodsAndNonemployeeServicesTransactionValuationMethodExpectedDividendRate
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Period an equity-based award is expected to be outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (f)(2)(i)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 50
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=51659978&loc=d3e25284-112666

+ Details

Name:	us-gaap_ShareBasedGoodsAndNonemployeeServicesTransactionValuationMethodExpectedTerm1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The estimated measure of the percentage amount by which a share price is expected to fluctuate during the expected term of a nonvested share or option award issued to other than an employee.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 50
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=51659978&loc=d3e25284-112666

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (f)(2)(ii)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

+ Details

Name:	us-gaap_ShareBasedGoodsAndNonemployeeServicesTransactionValuationMethodExpectedVolatilityRate
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The risk-free interest rate assumption that is used in valuing a nonvested share or option award issued to other than an employee.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (f)(2)(iv)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 50
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=51659978&loc=d3e25284-112666

+ Details

Name:	us-gaap_ShareBasedGoodsAndNonemployeeServicesTransactionValuationMethodRiskFreeInterestRate
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	efr_SharePurchaseWarrantsScheduleAxis=efr_IssuanceOfTwoFiveOneFiveSixTwoFiveWarrantsWithFairValueOfTwoZeroNineMillionForMarchTwoZeroOneSixMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	efr_SharePurchaseWarrantsScheduleAxis=efr_IssuanceOfTwoFiveOneFiveSixTwoFiveWarrantsWithFairValueOfOneSixThreeMillionForJuneThreeZeroTwoZeroOneSixMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	efr_SharePurchaseWarrantsScheduleAxis=efr_IssuanceOfOneTwoTwoFourZeroZeroZeroWarrantsWithFairValueOfZeroFourZeroMillionForJuneThreeZeroTwoZeroOneSixMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_ClassOfWarrantOrRightAxis=efr_September202016PublicOfferingMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_ClassOfWarrantOrRightAxis=efr_September202016PublicOffering2Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: