No definition available.

Name:	eng_NOTE4LINEOFCREDITANDLETTEROFCREDITFACILITIESDetailsLineItems
Namespace Prefix:	eng_
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- Definition

Description of the conditions for borrowing under the credit facility including the nature of any restrictions.

+ 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

+ Details

Name:	us-gaap_LineOfCreditFacilityCovenantTerms
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Balance Type:	na
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- Definition

Description of the terms of a credit facility arrangement. Terms typically include interest rate, collateral required, guarantees required, repayment requirements, and restrictions on use of assets and activities of the entity.

+ References

+ Details

Name:	us-gaap_LineOfCreditFacilityDescription
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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

Name:	us-gaap_LineOfCreditFacilityExpirationPeriod
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Data Type:	xbrli:durationItemType
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

Name:	us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The carrying amount as of the date of the latest financial statement presented of securities which are owned but transferred to serve as collateral for letter of credit arrangements, and for which the transferee does not have the right by contract or custom to sell or re-pledge them to an unrelated party.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 860

-SubTopic 30

-Section 50

-Paragraph 1A

-Subparagraph (b)(1)(i)

-URI http://asc.fasb.org/extlink&oid=55761124&loc=SL6224234-111729

+ Details

Name:	us-gaap_PledgedFinancialInstrumentsNotSeparatelyReportedSecuritiesForLetterOfCreditFacilities
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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount of stock repurchase plan authorized.

+ References

No definition available.

+ Details

Name:	us-gaap_StockRepurchaseProgramAuthorizedAmount1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Details

Name:	us-gaap_CreditFacilityAxis=us-gaap_LineOfCreditMember
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- Details

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NOTE 4 - LINE OF CREDIT AND LETTER OF CREDIT FACILITIES (Details) - Line of Credit [Member] - USD ($) $ in Millions		9 Months Ended
	Sep. 16, 2014	Sep. 26, 2015	Apr. 16, 2015
NOTE 4 - LINE OF CREDIT AND LETTER OF CREDIT FACILITIES (Details) [Line Items]
Line of Credit Facility, Expiration Period	3 years
Line of Credit Facility, Description	revolving loans of up to the lesser of $10.0 million (the "Commitment") or the Borrowing Base (as defined in the Loan Agreement).
Line of Credit Facility, Maximum Borrowing Capacity	$ 10.0
Stock Repurchase Program, Authorized Amount			$ 2.0
Line of Credit Facility, Covenant Terms		Company was in compliance with all of the material covenants of, the Loan Agreement
Maximum [Member]
NOTE 4 - LINE OF CREDIT AND LETTER OF CREDIT FACILITIES (Details) [Line Items]
Pledged Financial Instruments, Not Separately Reported, Securities for Letter of Credit Facilities	$ 2.5