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NOTE 5 - SEGMENT INFORMATION (Details) - Schedule of Segment Reporting Information, by Segment (USD $)
In Thousands, unless otherwise specified
Mar. 28, 2015
Dec. 27, 2014
Segment Reporting Information [Line Items]    
Total Assets $ 48,883us-gaap_Assets $ 51,656us-gaap_Assets
Engineering and Construction [Member]    
Segment Reporting Information [Line Items]    
Total Assets 11,850us-gaap_Assets
/ us-gaap_StatementBusinessSegmentsAxis
= eng_EngineeringAndConstructionMember		 12,172us-gaap_Assets
/ us-gaap_StatementBusinessSegmentsAxis
= eng_EngineeringAndConstructionMember
Automation Segment [Member]    
Segment Reporting Information [Line Items]    
Total Assets 24,101us-gaap_Assets
/ us-gaap_StatementBusinessSegmentsAxis
= eng_AutomationSegmentMember		 26,690us-gaap_Assets
/ us-gaap_StatementBusinessSegmentsAxis
= eng_AutomationSegmentMember
Corporate Segment [Member]    
Segment Reporting Information [Line Items]    
Total Assets $ 12,932us-gaap_Assets
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_CorporateMember		 $ 12,794us-gaap_Assets
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_CorporateMember