Note 7 - Goodwill - Changes in Carrying Amount of Goodwill (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Jan. 02, 2016
Balance	$ 11,630	$ 10,223
Balance	12,325	11,630
Substation Design Services, LLC [Member]
Goodwill recorded, acquisition		1,407
Allied Health Professionals, LLC [Member]
Goodwill recorded, acquisition	695
Balance	695
Engineering [Member]
Balance	4,411	3,004
Balance	4,411	4,411
Engineering [Member] | Substation Design Services, LLC [Member]
Goodwill recorded, acquisition		1,407
Engineering [Member] | Allied Health Professionals, LLC [Member]
Goodwill recorded, acquisition
Information Technology [Member]
Balance	5,516	5,516
Balance	5,516	5,516
Information Technology [Member] | Substation Design Services, LLC [Member]
Goodwill recorded, acquisition
Information Technology [Member] | Allied Health Professionals, LLC [Member]
Goodwill recorded, acquisition
Specialty Health Care [Member]
Balance	1,703	1,703
Balance	2,398	1,703
Specialty Health Care [Member] | Substation Design Services, LLC [Member]
Goodwill recorded, acquisition
Specialty Health Care [Member] | Allied Health Professionals, LLC [Member]
Goodwill recorded, acquisition	$ 695