XML 105 R52.htm IDEA: XBRL DOCUMENT
v2.4.0.8

Note 9 - Segments and Geographic Information (Details) - Summary of Geographic Sales (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2013 | Jun. 30, 2012 | Jun. 30, 2013 | Jun. 30, 2012
Note 9 - Segments and Geographic Information (Details) - Summary of Geographic Sales [Line Items] |  |  |  |
Net Sales | $ 7,381 | $ 7,672 | $ 12,714 | $ 12,974
United States [Member] |  |  |  |
Note 9 - Segments and Geographic Information (Details) - Summary of Geographic Sales [Line Items] |  |  |  |
Net Sales | 6,603 | 6,937 | 11,335 | 11,724
International [Member] |  |  |  |
Note 9 - Segments and Geographic Information (Details) - Summary of Geographic Sales [Line Items] |  |  |  |
Net Sales | $ 778 | $ 735 | $ 1,379 | $ 1,250

X
- Details
Name: | efoi_Note9SegmentsandGeographicInformationDetailsSummaryofGeographicSalesLineItems
Namespace Prefix: | efoi_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Total revenue from sale of goods and services rendered during the reporting period, in the normal course of business, reduced by sales returns and allowances, and sales discounts. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 1 -Article 5 + Details
Name: | us-gaap_SalesRevenueNet
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration