Note 8 - Intangible Assets (Details) - Components of Intangible Assets (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 28, 2013
Finite-Lived Intangible Assets [Line Items]
Balance as of December 29, 2012	$ 332
Amortization of intangibles during the thirty-nine week period ended September 28, 2013	96
Balance as of September 28, 2013	236
Information Technology [Member]
Finite-Lived Intangible Assets [Line Items]
Balance as of December 29, 2012	106
Amortization of intangibles during the thirty-nine week period ended September 28, 2013	60
Balance as of September 28, 2013	46
Engineering [Member]
Finite-Lived Intangible Assets [Line Items]
Balance as of December 29, 2012	226
Amortization of intangibles during the thirty-nine week period ended September 28, 2013	36
Balance as of September 28, 2013	$ 190