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Note 8 - Components of Intangible Assets (Details)
$ in Thousands
 9 Months Ended
Oct. 03, 2015
USD ($)
Engineering [Member] | SDS [Member]  
Intangibles acquired, SDS acquisition $ 140
Engineering [Member]  
Balance as of January 3, 2015 189
Amortization of intangibles during the thirty-nine week period ended October 3, 2015 (53)
Balance as of October 3, 2015 276
Information Technology [Member]  
Balance as of January 3, 2015 5
Amortization of intangibles during the thirty-nine week period ended October 3, 2015 $ (5)
Balance as of October 3, 2015
SDS [Member]  
Intangibles acquired, SDS acquisition $ 140
Balance as of January 3, 2015 194
Amortization of intangibles during the thirty-nine week period ended October 3, 2015 (58)
Balance as of October 3, 2015 $ 276