Note 8 - Intangible Assets (Details) - Components of Intangible Assets (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 28, 2014	Dec. 28, 2013
Finite-Lived Intangible Assets [Line Items]
Finite Lived Intangible asset	$ 176	$ 216
Amortization of intangibles during the twenty-six week period ended June 28, 2014	40
Engineering [Member]
Finite-Lived Intangible Assets [Line Items]
Finite Lived Intangible asset	155	179
Amortization of intangibles during the twenty-six week period ended June 28, 2014	24
Information Technology [Member]
Finite-Lived Intangible Assets [Line Items]
Finite Lived Intangible asset	21	37
Amortization of intangibles during the twenty-six week period ended June 28, 2014	$ 16