Note 7 - Goodwill - Changes in Carrying Amount of Goodwill (Details) $ in Thousands	6 Months Ended
	Jul. 01, 2017 USD ($)
Balance	$ 12,325
Goodwill recorded, RAF	133
Balance	12,458
Engineering [Member]
Balance	4,411
Goodwill recorded, RAF	133
Balance	4,544
Information Technology [Member]
Balance	5,516
Goodwill recorded, RAF
Balance	5,516
Specialty Health Care [Member]
Balance	2,398
Goodwill recorded, RAF
Balance	$ 2,398