Note 7 - Goodwill (Details) - Changes in Carrying Amount of Goodwill (USD $) In Thousands, unless otherwise specified					9 Months Ended					9 Months Ended
	Sep. 27, 2014	Dec. 28, 2013	Sep. 27, 2014 Information Technology [Member]	Dec. 28, 2013 Information Technology [Member]	Sep. 27, 2014 Engineering [Member] PCI [Member]	Sep. 27, 2014 Engineering [Member]	Dec. 28, 2013 Engineering [Member]	Sep. 27, 2014 Specialty Health Care [Member]	Dec. 28, 2013 Specialty Health Care [Member]	Sep. 27, 2014 PCI [Member]
Goodwill [Line Items]
Balance	$ 10,223	$ 9,545	$ 5,516	$ 5,516		$ 3,004	$ 2,326	$ 1,703	$ 1,703	$ 678
Contingent consideration recorded, PCI acquisition					$ 678					$ 678