NOTE 4 - DISPOSAL OF CONTINUING OPERATIONS (Details) (Golf Coast Engineering [Member], USD $)	9 Months Ended
Sep. 28, 2013
Golf Coast Engineering [Member]
NOTE 4 - DISPOSAL OF CONTINUING OPERATIONS (Details) [Line Items]
Proceeds from Divestiture of Businesses	$ 18,000,000
Amount of Cash at Closing of Sale	16,000,000
Note Receivable Payable to Company for Sale of Asset	3,000,000
Note Receivable, Interest Rate	4.00%
Disposal Group, Subsequent Adjustments	1,000,000
Discontinued Operation, Gain (Loss) on Disposal of Discontinued Operation, Net of Tax	$ 487,000
Disposal Group, Number of Employees Transferred	900

Amount of cash at closing of sale.

No definition available.

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- Definition

The number of employees transferred with the disposal group.

+ References

No definition available.

+ Details

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Period Type:	duration

- Definition

Amount of subsequent adjustments to value of disposal.

+ References

No definition available.

+ Details

Name:	eng_DisposalGroupSubsequentAdjustments
Namespace Prefix:	eng_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Details

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- Definition

Interest rate on notes receivable.

+ References

No definition available.

+ Details

Name:	eng_NoteReceivableInterestRate
Namespace Prefix:	eng_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of note receivable payable to company for sale of asset.

+ References

No definition available.

+ Details

Name:	eng_NoteReceivablePayableToCompanyForSaleOfAsset
Namespace Prefix:	eng_
Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of gain (loss), after tax expense or benefit and not previously recognized, resulting from the sale of a business component.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 205

-SubTopic 20

-Section 45

-Paragraph 3

-URI http://asc.fasb.org/extlink&oid=6892542&loc=d3e957-107759

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 205

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=6360339&loc=d3e1361-107760

+ Details

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

- Definition

The cash inflow associated with the amount received from the sale of a portion of the company's business, for example a segment, division, branch or other business, during the period.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Investing Activities

-URI http://asc.fasb.org/extlink&oid=6516133

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 12

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3179-108585

+ Details

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