Note 1 - Summary of Significant Accounting Policies - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 28, 2019	Dec. 29, 2018
Revenues	$ 191,100	$ 200,352
Engineering Services [Member]
Revenues	67,873	86,078
Engineering Services [Member] | Time-and-materials Contract [Member]
Revenues	55,195	71,639
Engineering Services [Member] | Fixed-price Contract [Member]
Revenues	12,678	14,424
Engineering Services [Member] | Permanent Placement Services [Member]
Revenues		15
Health Care [Member]
Revenues	89,348	83,663
Health Care [Member] | Time-and-materials Contract [Member]
Revenues	88,057	82,153
Health Care [Member] | Permanent Placement Services [Member]
Revenues	1,291	1,510
Technology Service [Member]
Revenues	33,879	30,611
Technology Service [Member] | Time-and-materials Contract [Member]
Revenues	33,384	30,361
Technology Service [Member] | Permanent Placement Services [Member]
Revenues	$ 495	$ 250