Note 6 - Acquisitions (Details) - PCI Purchase Consideration (USD $) In Thousands, unless otherwise specified					9 Months Ended
	Sep. 27, 2014	Dec. 28, 2013	Sep. 27, 2014 Restricted Covenants [Member] PCI [Member]	Sep. 27, 2014 Customer Relationships [Member] PCI [Member]	Sep. 27, 2014 PCI [Member]
Business Acquisition [Line Items]
Assumption of current liabilities, net of current assets					$ 7
Contingent consideration, net present value					765
Total consideration					772
Fixed assets					26
Intangible assets			23	45
Goodwill	$ 10,223	$ 9,545			$ 678