The percentage of eligible receivables which determines the amount of line of credit available.

No definition available.

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- Definition

The threshold for determining the available line of credit with regards to the lessor of the percentage of lower of cost or market value of inventory or a predetermined value.

+ References

No definition available.

+ Details

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- Definition

The threshold for determining the available line of credit with regards to the lessor of the percentage of lower of cost or market value of inventory or a predetermined value.

+ References

No definition available.

+ Details

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- Definition

The percentage of an entities stock that is pledged as collateral for a line of credit.

+ References

No definition available.

+ Details

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- Definition

The fee, expressed as a percentage of the line of credit facility, for early termination of the credit facility.

+ References

No definition available.

+ Details

Name:	efoi_LineOfCreditFacilityLiquidationDamages
Namespace Prefix:	efoi_
Data Type:	num:percentItemType
Balance Type:	na
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- Details

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- Definition

Exercise price per share or per unit of warrants or rights outstanding.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 235

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.4-08.(i)(4))

-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 08

-Paragraph i

-Subparagraph 4

-Article 4

+ Details

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Namespace Prefix:	us-gaap_
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Balance Type:	na
Period Type:	instant

- Definition

Number of securities into which the class of warrant or right may be converted. For example, but not limited to, 500,000 warrants may be converted into 1,000,000 shares.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 235

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.4-08.(i)(2))

-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 08

-Paragraph i

-Subparagraph 2

-Article 4

+ Details

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Balance Type:	na
Period Type:	instant

- Definition

The price per share of the conversion feature embedded in the debt instrument.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 470

-SubTopic 20

-Section 50

-Paragraph 5

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=6928298&loc=SL6031898-161870

+ Details

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- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 22

-Article 5

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.22(a)(1))

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

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- Definition

Gross amount of debt extinguished.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amount borrowed under the credit facility as of the balance sheet date.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 19, 22

-Article 5

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The fee, expressed as a percentage of the line of credit facility, for the line of credit facility regardless of whether the facility has been used.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Period remaining on line of credit facility before it terminates, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

The effective interest rate during the reporting period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.19(b),22(b))

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 19, 22

-Article 5

+ Details

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Balance Type:	na
Period Type:	duration

- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

+ Details

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Namespace Prefix:	us-gaap_
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Balance Type:	credit
Period Type:	instant

- Definition

Amount of long-term debt, sinking fund requirements, and other securities redeemable at fixed or determinable prices and dates maturing in the third fiscal year following the latest fiscal year.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 470

-SubTopic 10

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6802200&loc=d3e1835-112601

+ Details

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Balance Type:	credit
Period Type:	instant

- Definition

Amount of long-term debt, sinking fund requirements, and other securities redeemable at fixed or determinable prices and dates maturing in the second fiscal year following the latest fiscal year.

+ References

+ Details

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Note 9 - Debt (Details) (USD $)	1 Months Ended	3 Months Ended	12 Months Ended
Note 9 - Debt (Details) (USD $)	Dec. 22, 2011	Jun. 30, 2013	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Note 9 - Debt (Details) [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity (in Dollars)	$ 4,500,000
Line of Credit Facility Available Percentage of Receivables	85.00%
Line of Credit Facility, Commitment Fee Percentage	1.00%
Line of Credit Facility, Expiration Period	3 years
Line of Credit Facility Liquidation Damages			1.00%
Line of Credit Facility, Amount Outstanding (in Dollars)			218,000	1,600,000
Long-term Debt, Maturities, Repayments of Principal in Year Two (in Dollars)			5,717,000
Long-term Debt, Maturities, Repayments of Principal in Year Three (in Dollars)			566,000
Extinguishment of Debt, Amount (in Dollars)		500,000
Class of Warrant or Right, Exercise Price of Warrants or Rights (in Dollars per Item)			0.44	0.76	1.43	1.42
Crescent Lighting, Ltd. [Member] \| Letter of Credit Agreement - Mark Plush [Member]
Note 9 - Debt (Details) [Line Items]
Line of Credit Facility Collateral Stock Percent			32.00%
Unsecured Convertible Notes [Member]
Note 9 - Debt (Details) [Line Items]
Debt Instrument, Interest Rate, Stated Percentage			5.00%
Long-term Debt, Maturities, Repayments of Principal in Year Two (in Dollars)			500,000
Long-term Debt, Maturities, Repayments of Principal in Year Three (in Dollars)			5,645,000
Debt Instrument, Convertible, Conversion Price (in Dollars per share)			$ 0.23
Convertible Debt [Member]
Note 9 - Debt (Details) [Line Items]
Debt Instrument, Interest Rate, Stated Percentage			3.02%
Cognovit Note - Keystone Ruby, LLC [Member]
Note 9 - Debt (Details) [Line Items]
Debt Instrument, Interest Rate, Stated Percentage			10.00%
Letter of Credit Agreement - Mark Plush [Member]
Note 9 - Debt (Details) [Line Items]
Debt Instrument, Interest Rate, Stated Percentage			12.50%
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in Shares)			125,000
Class of Warrant or Right, Exercise Price of Warrants or Rights (in Dollars per Item)			0.01
Unsecured Promissory Note - Quercus Trust [Member]
Note 9 - Debt (Details) [Line Items]
Debt Instrument, Interest Rate, Stated Percentage			1.00%
Percentage of Inventory, Lower of Cost or Market Value [Member]
Note 9 - Debt (Details) [Line Items]
Line of Credit Facility Available Threshold Percent	50.00%
Inventory, Maximum Value [Member]
Note 9 - Debt (Details) [Line Items]
Line of Credit Facility Available Threshold Value (in Dollars)	$ 250,000
Borrowing on Accounts Receivable [Member]
Note 9 - Debt (Details) [Line Items]
Line of Credit Facility, Interest Rate During Period	8.50%
Borrowing on Inventories [Member]
Note 9 - Debt (Details) [Line Items]
Line of Credit Facility, Interest Rate During Period	10.00%
Borrowing on Overdrafts [Member]
Note 9 - Debt (Details) [Line Items]
Line of Credit Facility, Interest Rate During Period	13.00%