Note 7 - Goodwill (Details) - Changes in Carrying Amount of Goodwill (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Jan. 03, 2015	Dec. 28, 2013
Goodwill [Line Items]
Balance	$ 10,223	$ 9,545
Information Technology [Member]
Goodwill [Line Items]
Balance	5,516	5,516
Engineering [Member] | PCI [Member]
Goodwill [Line Items]
Goodwill recorded, PCI acquisition	678
Engineering [Member]
Goodwill [Line Items]
Balance	3,004	2,326
Specialty Health Care [Member]
Goodwill [Line Items]
Balance	1,703	1,703
PCI [Member]
Goodwill [Line Items]
Balance	678
Goodwill recorded, PCI acquisition	$ 678