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Note 2 Acquisitions - Unaudited Pro Forma Information (Detail) - Accutronics Limited - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended
Mar. 27, 2016
Mar. 29, 2015
Business Acquisition [Line Items]    
Revenue $ 20,833 $ 22,330
Operating Income 482 706
Net Income $ 281 $ 410
Earnings Per Share    
Basic $ 0.02 $ 0.02
Diluted $ 0.02 $ 0.02