XML 65 R65.htm IDEA: XBRL DOCUMENT
v2.4.0.8

Note 13 - Shareholders Equity (Details) - Warrants Outstanding | 12 Months Ended |  |  |
--- | --- | --- | --- | ---
Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010
Class of Warrant or Right [Line Items] |  |  |  |
Exercise Price | 0.44 | 0.76 | 1.43 | 1.42
Number of Shares Outstanding | 11,075,494 | 13,056,378 | 3,256,378 | 3,291,378
Weighted Average Remaining Contactual Life | 1 year 73 days |  |  |
Exercise Price $0.01 [Member] |  |  |  |
Class of Warrant or Right [Line Items] |  |  |  |
Exercise Price | 0.01 |  |  |
Number of Shares Outstanding | 300,000 |  |  |
Weighted Average Remaining Contactual Life | 1 year 255 days |  |  |
Exercise Price $0.35 [Member] |  |  |  |
Class of Warrant or Right [Line Items] |  |  |  |
Exercise Price | 0.35 |  |  |
Number of Shares Outstanding | 25,494 |  |  |
Weighted Average Remaining Contactual Life | 2 years 328 days |  |  |
Exercise Price $0.40 [Member] |  |  |  |
Class of Warrant or Right [Line Items] |  |  |  |
Exercise Price | 0.40 |  |  |
Number of Shares Outstanding | 600,000 |  |  |
Weighted Average Remaining Contactual Life | 1 year |  |  |
Exercise Price $0.43 [Member] |  |  |  |
Class of Warrant or Right [Line Items] |  |  |  |
Exercise Price | 0.43 |  |  |
Number of Shares Outstanding | 9,800,000 |  |  |
Weighted Average Remaining Contactual Life | 1 year 73 days |  |  |
Exercise Price $1.20 [Member] |  |  |  |
Class of Warrant or Right [Line Items] |  |  |  |
Exercise Price | 1.20 |  |  |
Number of Shares Outstanding | 350,000 |  |  |
Weighted Average Remaining Contactual Life | 1 year 73 days |  |  |

X
- Definition Weighted average remaining contractual term for warrant or right. + References No definition available. + Details
Name: | efoi_ClassOfWarrantOrRightWeightedAverageRemainingContactualTerm
Namespace Prefix: | efoi_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 08 -Paragraph i -Subparagraph 4 -Article 4 + Details
Name: | us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights
Namespace Prefix: | us-gaap_
Data Type: | us-types:perUnitItemType
Balance Type: | na
Period Type: | instant

X
- 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 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 08 -Paragraph i -Article 4 + Details
Name: | us-gaap_ClassOfWarrantOrRightOutstanding
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant