XML 59 R48.htm IDEA: XBRL DOCUMENT
v3.24.1

Basis of Presentation and Summary of Significant Accounting Policies - Product Warranties (Details) | 12 Months Ended
--- | ---
Dec. 31, 2023 contract
Product Warranty Liability [Line Items] |
Product warranty, number of years of products sold (in years) | 20 years
Number of contracts expired | 1
Product warranty, number of years for expired contract (in years) | 10 years
Minimum | Commercial Products |
Product Warranty Liability [Line Items] |
Standard product warranty, number of years (in years) | 5 years
Minimum | MMM LED Products |
Product Warranty Liability [Line Items] |
Standard product warranty, number of years (in years) | 5 years
Maximum | Commercial Products |
Product Warranty Liability [Line Items] |
Standard product warranty, number of years (in years) | 10 years
Maximum | MMM LED Products |
Product Warranty Liability [Line Items] |
Standard product warranty, number of years (in years) | 10 years

X
- Definition Product Warranty, Number Of Contracts Expired + References No definition available. + Details
Name: | efoi_ProductWarrantyNumberOfContractsExpired
Namespace Prefix: | efoi_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Product Warranty, Number Of Years For Expired Contract + References No definition available. + Details
Name: | efoi_ProductWarrantyNumberOfYearsForExpiredContract
Namespace Prefix: | efoi_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Product Warranty, Number Of Years For Product Sold + References No definition available. + Details
Name: | efoi_ProductWarrantyNumberOfYearsForProductSold
Namespace Prefix: | efoi_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Standard Product Warranty, Number of Years + References No definition available. + Details
Name: | efoi_StandardProductWarrantyNumberofYears
Namespace Prefix: | efoi_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_ProductWarrantyLiabilityLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | srt_RangeAxis=srt_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ProductOrServiceAxis=efoi_CommercialProductsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ProductOrServiceAxis=efoi_MMMLEDProductsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |