XML 21 R8.htm IDEA: XBRL DOCUMENT
v3.5.0.2

Consolidated Statements of Cash Flows (Parenthetical) | Sep. 30, 2016 | Feb. 28, 2015
--- | --- | ---
Ownership percentage |  | 50.00%
Roca Honda |  |
Ownership percentage | 40.00% |

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
- Details
Name: | us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis=efr_RocaHondaInvestmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |