XML 25 R27.htm IDEA: XBRL DOCUMENT
v2.4.0.8

Note 6 - Contracts in Progress (Tables) | 9 Months Ended
--- | ---
Sep. 30, 2013
Contracts In Progress [Abstract] |
Schedule of Contracts in Progress [Table Text Block] |
|  | September 30, 2013 |  |  | December 31, 2012 |
Costs incurred on uncompleted contracts |  | $ | 11,107 |  |  | $ | 7,067 |
Estimated earnings |  |  | 1,817 |  |  |  | 1,330 |
Total revenues |  |  | 12,924 |  |  |  | 8,397 |
Less: billings to date |  |  | 14,223 |  |  |  | 8,762 |
Total |  | $ | (1,299 | ) |  | $ | (365 | )
Balance sheet classification: |  |  |  |  |  |  |  |
Costs in excess of billings on uncompleted contracts |  | $ | 162 |  |  | $ | 99 |
Billings in excess of costs on uncompleted contracts |  |  | (1,461 | ) |  |  | (464 | )
Total |  | $ | (1,299 | ) |  | $ | (365 | )

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

X
- Definition Table of contracts in progress. + References No definition available. + Details
Name: | efoi_ScheduleOfContractsInProgressTableTextBlock
Namespace Prefix: | efoi_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration