Note 6 - Acquisitions (Details) - Contingent Consideration (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Jan. 03, 2015	Dec. 28, 2013
Business Acquisition, Contingent Consideration [Line Items]
Contingent consideration balance as of	$ 930
Paid in current year	(313)
Liability reduced in current year	(129)	(92)
Contingent consideration balance as of	1,254	930
Short Term [Member] | PCI [Member]
Business Acquisition, Contingent Consideration [Line Items]
Recorded for PCI	261
Short Term [Member]
Business Acquisition, Contingent Consideration [Line Items]
Contingent consideration balance as of	523
Paid in current year	(313)
Liability reduced in current year	(117)
Moved from long term to short term	125
Contingent consideration balance as of	479
Long Term [Member] | PCI [Member]
Business Acquisition, Contingent Consideration [Line Items]
Recorded for PCI	505
Long Term [Member]
Business Acquisition, Contingent Consideration [Line Items]
Contingent consideration balance as of	407
Liability reduced in current year	(12)
Moved from long term to short term	(125)
Contingent consideration balance as of	775
PCI [Member]
Business Acquisition, Contingent Consideration [Line Items]
Recorded for PCI	$ 766