XML 45 R37.htm IDEA: XBRL DOCUMENT v3.4.0.3

LOANS AND BORROWINGS (Narrative) (Details)	1 Months Ended	12 Months Ended
	Jul. 31, 2012 CAD CAD / shares	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)	Mar. 31, 2016 USD ($)	Feb. 29, 2016 USD ($)	Jun. 18, 2015	Feb. 28, 2015 USD ($)	Jul. 24, 2012 CAD shares
Public Offering of Floating-Rate Convertible Unsecured Subordinated Debentures | shares								22,000
Price per Debenture Issuance | CAD								CAD 1,000
Proceeds from Issuance of Debt | CAD	CAD 21,550,000
Conversion Price Per Share | CAD / shares	CAD 15.00
Debt Instrument, Interest Rate, Stated Percentage						5.75%	7.00%
Consecutive Trading Days	20 days
Debt, Current | CAD								CAD 1,000
Volume-Weighted Average Trading Price of the Common Shares								95.00%
Loss on Revaluation of Convertible Debentures		$ 1,550,000	$ 300,000
Notes and Loans Payable				$ 16,380,000			$ 450,000
Equity Method Investment, Ownership Percentage							50.00%
Notes Payable, Current				$ 3,270,000
Repayable on February 13, 2016 [Member]
Notes and Loans Payable					$ 50,000
Repayable on February 13, 2017 [Member]
Notes and Loans Payable					$ 450,000
Minimum [Member]
Debt Instrument, Interest Rate, Stated Percentage								8.50%
Average Trading Price is Not Less than Percent of the Conversion Price	125.00%
Obligation to Repay Debenture	40 days
Maximum [Member]
Debt Instrument, Interest Rate, Stated Percentage								13.50%
Obligation to Repay Debenture	60 days

X

- Definition

Average Trading Price is Not Less than Percent of the Conversion Price

+ References

No definition available.

+ Details

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

X

- Definition

Consecutive Trading Days

+ References

No definition available.

+ Details

Name:	efr_ConsecutiveTradingDays
Namespace Prefix:	efr_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Conversion Price Per Share

+ References

No definition available.

+ Details

Name:	efr_ConversionPricePerShare
Namespace Prefix:	efr_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Loss on Revaluation of Convertible Debentures

+ References

No definition available.

+ Details

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

X

- Definition

Obligation to Repay Debenture

+ References

No definition available.

+ Details

Name:	efr_ObligationToRepayDebenture
Namespace Prefix:	efr_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Price per Debenture Issuance

+ References

No definition available.

+ Details

Name:	efr_PricePerDebentureIssuance
Namespace Prefix:	efr_
Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Public Offering of Floating-Rate Convertible Unsecured Subordinated Debentures

+ References

No definition available.

+ Details

Name:	efr_PublicOfferingOfFloatingRateConvertibleUnsecuredSubordinatedDebentures
Namespace Prefix:	efr_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Volume-Weighted Average Trading Price of the Common Shares

+ References

No definition available.

+ Details

Name:	efr_VolumeWeightedAverageTradingPriceOfTheCommonShares
Namespace Prefix:	efr_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Amount of short-term debt and current maturity of long-term debt and capital lease obligations due within one year or the normal operating cycle, if longer.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.19,20)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

Name:	us-gaap_DebtCurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22(a)(1))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

Name:	us-gaap_DebtInstrumentInterestRateStatedPercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
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://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 323
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=6382943&loc=d3e33918-111571

+ Details

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

X

- Definition

Including the current and noncurrent portions, carrying value as of the balance sheet date of all notes and loans payable (with maturities initially due after one year or beyond the operating cycle if longer).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03.16)
-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 02
-Paragraph 19, 20, 22
-Article 5

+ Details

Name:	us-gaap_NotesAndLoansPayable
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Sum of the carrying values as of the balance sheet date of the portions of long-term notes payable due within one year or the operating cycle if longer.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.19,20)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

Name:	us-gaap_NotesPayableCurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

The cash inflow during the period from additional borrowings in aggregate debt. Includes proceeds from short-term and long-term debt.

+ References

No definition available.

+ Details

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

X

- Details

Name:	us-gaap_LongtermDebtTypeAxis=efr_RepayableOnFebruaryOneThreeTwoZeroOneSixMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_LongtermDebtTypeAxis=efr_RepayableOnFebruaryOneThreeTwoZeroOneSevenMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_RangeAxis=us-gaap_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_RangeAxis=us-gaap_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: