NOTE 7 - STOCK REPURCHASE PROGRAM (Details) - Stock Repurchase Program [Member] - USD ($) $ in Thousands	9 Months Ended
Sep. 26, 2015	Apr. 21, 2015
NOTE 7 - STOCK REPURCHASE PROGRAM (Details) [Line Items]
Stock Repurchase Program, Authorized Amount		$ 2,000
Stock Repurchased During Period and Held in Treasury, Shares (in Shares)	11,299
Stock Repurchased During Period and Held in Treasury, Value	$ 11

Equity impact of the value of stock that has been repurchased during the period and has not been retired and is held in treasury.

No definition available.

Name:	eng_StockRepurchasedDuringPeriodAndHeldInTreasuryValue
Namespace Prefix:	eng_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration