XML 56 R43.htm IDEA: XBRL DOCUMENT
v3.5.0.2

CAPITAL STOCK - Narrative (Details) - USD ($) $ / shares in Units, $ in Thousands |  |  |  |  | 9 Months Ended |
--- | --- | --- | --- | --- | --- | ---
Sep. 20, 2016 | Jun. 16, 2016 | May 27, 2016 | Mar. 14, 2016 | Sep. 30, 2016 | Sep. 30, 2015 | Dec. 31, 2015
Class of Warrant or Right [Line Items] |  |  |  |  |  |  |
Proceeds from issuance of common stock | $ 13,790 |  |  |  | $ 25,291 | $ 3 |
Partners' capital account, units, sold in public offering (in shares) | 8,337,500 |  |  |  |  |  |
Shares issued, price per share (in dollars per share) | $ 1.80 |  |  |  |  |  |
Partners' capital account, units, sold in public offering, common shares per unit (in shares) | 1 |  |  |  |  |  |
Partners' capital account, units, sold in public offering, warrants per unit (in shares) | 0.5 |  |  |  |  |  |
Common stock, shares, issued (in shares) | 8,337,500 |  |  |  | 66,205,153 |  | 46,519,132
Number of warrants issued (in shares) | 4,168,750 |  |  |  |  |  |
Exercise price of warrants (in dollars per share) | $ 2.45 |  |  |  | $ 2.45 |  |
Fair value of warrants | $ 3,170 |  |  |  | $ 2,926 |  |
Number of warrants outstanding (in shares) |  |  |  |  | 4,168,750 |  |
Issuance of 200,200 shares |  |  |  |  |  |  |
Class of Warrant or Right [Line Items] |  |  |  |  |  |  |
Shares used during period (in shares) |  |  |  |  | 200,225 |  |
Proceeds from issuance of common stock |  |  |  |  | $ 540 |  |
Issuance of 5,031,250 units for public offering |  |  |  |  |  |  |
Class of Warrant or Right [Line Items] |  |  |  |  |  |  |
Shares used during period (in shares) |  |  |  | 5,031,250 |  |  |
Proceeds from issuance of common stock |  |  |  | $ 12,080 |  |  |
Equity issuance, per Share amount (in dollars per share) |  |  |  | $ 2.40 |  |  |
Units issued during period, underlying shares |  |  |  | 5,031,250 |  |  |
Units issued during period, underlying warrants |  |  |  | 2,515,625 |  |  |
Investment warrants, exercise price (in dollars per share) |  |  |  | $ 3.20 |  |  |
Issuance of 2,515,625 warrants for public offering |  |  |  |  |  |  |
Class of Warrant or Right [Line Items] |  |  |  |  |  |  |
Warrants issued during period, value |  |  |  | $ 2,090 |  |  |
Number of warrants granted in period (in shares) |  |  |  | 2,515,625 |  |  |
Issuance of 1,212,173 shares to acquire Roca Honda Joint Venture |  |  |  |  |  |  |
Class of Warrant or Right [Line Items] |  |  |  |  |  |  |
Stock issued during period, Shares, acquisitions (in shares) |  |  | 1,212,173 |  |  |  |
Percentage of voting interests acquired |  |  | 40.00% |  |  |  |
Stock issued during period, value, acquisitions |  |  | $ 2,680 |  |  |  |
Issuance of 4,551,284 shares to acquire Alta Mesa |  |  |  |  |  |  |
Class of Warrant or Right [Line Items] |  |  |  |  |  |  |
Stock issued during period, Shares, acquisitions (in shares) |  | 4,551,284 |  |  |  |  |
Stock issued during period, value, acquisitions |  | $ 11,380 |  |  |  |  |
Share Purchase Warrants Denominated in United States Dollars |  |  |  |  |  |  |
Class of Warrant or Right [Line Items] |  |  |  |  |  |  |
Fair value of warrants |  |  |  |  | $ 3,663 |  |
January Two Five Two Zero One Seven Expiry Date | Share Purchase Warrants Denominated in United States Dollars |  |  |  |  |  |  |
Class of Warrant or Right [Line Items] |  |  |  |  |  |  |
Exercise price of warrants (in dollars per share) |  |  |  |  | $ 6.28 |  |
Fair value of warrants |  |  |  |  | $ 10 |  |
Number of warrants outstanding (in shares) |  |  |  |  | 1,224,000 |  |
March One Four Two Zero One Nine Expiry Date | Share Purchase Warrants Denominated in United States Dollars |  |  |  |  |  |  |
Class of Warrant or Right [Line Items] |  |  |  |  |  |  |
Exercise price of warrants (in dollars per share) |  |  |  |  | $ 3.20 |  |
Fair value of warrants |  |  |  |  | $ 737 |  |
Number of warrants outstanding (in shares) |  |  |  |  | 2,515,625 |  |

X
- Definition Class of Warrant or Right, Grants in Period, Net of Forfeitures + References No definition available. + Details
Name: | efr_ClassOfWarrantOrRightGrantsInPeriod
Namespace Prefix: | efr_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Warrants Issued During Period, Value + References No definition available. + Details
Name: | efr_ClassOfWarrantOrRightGrantsInPeriodValue
Namespace Prefix: | efr_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Class of Warrant or Right, Issued + References No definition available. + Details
Name: | efr_ClassofWarrantorRightIssued
Namespace Prefix: | efr_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition Equity Issuance, Per Share Amount + References No definition available. + Details
Name: | efr_EquityIssuanceAmountPerShare
Namespace Prefix: | efr_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | duration

X
- Definition Partners' Capital Account, Units, Sold in Public Offering, Common Shares per Unit + References No definition available. + Details
Name: | efr_PartnersCapitalAccountUnitsSoldinPublicOfferingCommonSharesperUnit
Namespace Prefix: | efr_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Partners' Capital Account, Units, Sold in Public Offering, Warrants per Unit + References No definition available. + Details
Name: | efr_PartnersCapitalAccountUnitsSoldinPublicOfferingWarrantsperUnit
Namespace Prefix: | efr_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Units Issued During Period, Underlying Shares + References No definition available. + Details
Name: | efr_UnitsIssuedDuringPeriodUnderlyingShares
Namespace Prefix: | efr_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Units Issued During Period, Underlying Warrants + References No definition available. + Details
Name: | efr_UnitsIssuedDuringPeriodUnderlyingWarrants
Namespace Prefix: | efr_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Exercise price of the warrants. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Article 12 -Section 13 -Sentence Column A + Details
Name: | invest_InvestmentWarrantsExercisePrice
Namespace Prefix: | invest_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | duration

X
- Definition Percentage of voting equity interests acquired at the acquisition date in the business combination. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=56956515&loc=d3e1392-128463 + Details
Name: | us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Exercise price per share or per unit of warrants or rights outstanding. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(i)(4)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 + Details
Name: | us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1
Namespace Prefix: | us-gaap_
Data Type: | num:perShareItemType
Balance Type: | na
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_ClassOfWarrantOrRightLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of warrants or rights outstanding. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(i)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 + Details
Name: | us-gaap_ClassOfWarrantOrRightOutstanding
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition Total number of common shares of an entity that have been sold or granted to shareholders (includes common shares that were issued, repurchased and remain in the treasury). These shares represent capital invested by the firm's shareholders and owners, and may be all or only a portion of the number of shares authorized. Shares issued include shares outstanding and shares held in the treasury. + 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 210.5-02.29) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 30 -Article 5 + Details
Name: | us-gaap_CommonStockSharesIssued
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition The number of units sold in a public offering of each class of partners' capital account. Units represent shares of ownership of the general, limited, and preferred partners. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 5 -Subparagraph (SAB TOPIC 4.F) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187171-122770 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph 16 -Subparagraph a, b -Article 6 + Details
Name: | us-gaap_PartnersCapitalAccountUnitsSoldInPublicOffering
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition The cash inflow from the additional capital contribution to the entity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3255-108585 + Details
Name: | us-gaap_ProceedsFromIssuanceOfCommonStock
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Per share or per unit amount of equity securities issued. + References No definition available. + Details
Name: | us-gaap_SharesIssuedPricePerShare
Namespace Prefix: | us-gaap_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | instant

X
- Definition Value of preferred stock and warrants for common stock issued. + References No definition available. + Details
Name: | us-gaap_StockAndWarrantsIssuedDuringPeriodValuePreferredStockAndWarrants
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Number of shares of stock issued during the period pursuant to acquisitions. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -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 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.28,29) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 29, 30 -Article 5 + Details
Name: | us-gaap_StockIssuedDuringPeriodSharesAcquisitions
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of new stock issued during the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644 Reference 2: http://www.xbrl.org/2003/role/presentationRef -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://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 29, 30 -Article 5 + Details
Name: | us-gaap_StockIssuedDuringPeriodSharesNewIssues
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Value of stock issued pursuant to acquisitions during the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644 Reference 2: http://www.xbrl.org/2003/role/presentationRef -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://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.29-31) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_StockIssuedDuringPeriodValueAcquisitions
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Details
Name: | efr_EquityTransactionAxis=efr_IssuanceOfTwoZeroZeroTwoZeroZeroSharesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | efr_EquityTransactionAxis=efr_IssuanceOfFiveZeroThreeOneTwoFiveZeroUnitsForPublicOfferingMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | efr_EquityTransactionAxis=efr_IssuanceOfTwoFiveOneFiveSixTwoFiveWarrantsForPublicOfferingMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | efr_EquityTransactionAxis=efr_IssuanceOfOneTwoOneTwoOneSevenThreeSharesToAcquireRocaHondaJointVentureMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | efr_EquityTransactionAxis=efr_IssuanceOfFourFiveFiveOneTwoEightFourSharesToAcquireAltaMesaMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | efr_SharePurchaseWarrantsScheduleAxis=efr_SharePurchaseWarrantsDenominatedInUnitedStatesDollarsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ClassOfWarrantOrRightAxis=efr_JanuaryTwoFiveTwoZeroOneSevenExpiryDateMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ClassOfWarrantOrRightAxis=efr_MarchOneFourTwoZeroOneNineExpiryDateMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |