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Note 7 - Contracts in Progress (Tables) | 3 Months Ended
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Mar. 31, 2014
Contracts In Progress [Abstract] |
Schedule of Contracts in Progress [Table Text Block] |
|  | March 31, |  |  | December 31, |
|  | 2014 |  |  | 2013 |
Costs incurred on uncompleted contracts |  | $ | 8,095 |  |  | $ | 7,347 |
Estimated earnings |  |  | 1,954 |  |  |  | 1,603 |
Total revenues |  |  | 10,049 |  |  |  | 8,950 |
Less: billings to date |  |  | 10,149 |  |  |  | 9,569 |
Total |  | $ | (100 | ) |  | $ | (619 | )
Balance sheet classification: |  |  |  |  |  |  |  |
Costs and estimated earnings in excess of billings on uncompleted contracts |  | $ | 255 |  |  | $ | 145 |
Billings in excess of costs and estimated earnings on uncompleted contracts |  |  | (355 | ) |  |  | (764 | )
Total |  | $ | (100 | ) |  | $ | (619 | )

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- Details
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Namespace Prefix: | efoi_
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Period Type: | duration

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- Definition Table of contracts in progress. + References No definition available. + Details
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Namespace Prefix: | efoi_
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Balance Type: | na
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