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| 0000924168-22-000023.txt | 2022-03-17 08:03:08 | |
 0000924168-22-000023-xbrl.zip | 433765 | 2022-03-17 08:03:08 |
| efoi-20211231.htm | 2205030 | 2022-03-17 08:03:08 |
| efoi-20211231.xsd | 77595 | 2022-03-17 08:03:08 |
| efoi-20211231_cal.xml | 97602 | 2022-03-17 08:03:08 |
| efoi-20211231_def.xml | 433402 | 2022-03-17 08:03:08 |
| efoi-20211231_htm.xml | 1769508 | 2022-03-17 08:03:08 |
| efoi-20211231_lab.xml | 878107 | 2022-03-17 08:03:08 |
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| ex231-10xk123121.htm | 3293 | 2022-03-17 08:03:08 |
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| ex321-10xk123121.htm | 6680 | 2022-03-17 08:03:08 |
| FilingSummary.xml | 55667 | 2022-03-17 08:03:08 |
| Financial_Report.xlsx | 146429 | 2022-03-17 08:03:08 |
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| report.css | 2768 | 2022-03-17 08:03:08 |
| Show.js | 1086 | 2022-03-17 08:03:08 |