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NOTE 8 - SUBSEQUENT EVENTS (Details) (USD $)
3 Months Ended 0 Months Ended
Mar. 28, 2015
Mar. 29, 2014
Apr. 21, 2015
Apr. 16, 2015
NOTE 8 - SUBSEQUENT EVENTS (Details) [Line Items]        
Proceeds from Collection of Notes Receivable $ 983,000us-gaap_ProceedsFromCollectionOfNotesReceivable $ 0us-gaap_ProceedsFromCollectionOfNotesReceivable    
Notes Receivable [Member] | Subsequent Event [Member] | Furmanite Corporation [Member]        
NOTE 8 - SUBSEQUENT EVENTS (Details) [Line Items]        
Proceeds from Collection of Notes Receivable     3,600,000us-gaap_ProceedsFromCollectionOfNotesReceivable
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= us-gaap_NotesReceivableMember
/ us-gaap_AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyTypeAxis
= eng_FurmaniteCorporationMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
 
Subsequent Event [Member] | Line of Credit [Member] | Maximum [Member]        
NOTE 8 - SUBSEQUENT EVENTS (Details) [Line Items]        
Stock Repurchased, Shares Authorized, Value       $ 2,000,000eng_StockRepurchasedSharesAuthorizedValue
/ us-gaap_CreditFacilityAxis
= us-gaap_LineOfCreditMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember