Note 1 - Summary of Significant Accounting Policies - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 02, 2021	Dec. 28, 2019
Revenues	$ 150,409	$ 191,100
Engineering Services [Member]
Revenues	57,715	67,873
Engineering Services [Member] | Time-and-materials Contract [Member]
Revenues	43,359	55,195
Engineering Services [Member] | Fixed-price Contract [Member]
Revenues	14,145	12,678
Engineering Services [Member] | Permanent Placement Services [Member]
Revenues	211
Health Care [Member]
Revenues	60,481	89,348
Health Care [Member] | Time-and-materials Contract [Member]
Revenues	59,692	88,057
Health Care [Member] | Permanent Placement Services [Member]
Revenues	789	1,291
Technology Service [Member]
Revenues	32,213	33,879
Technology Service [Member] | Time-and-materials Contract [Member]
Revenues	31,723	33,384
Technology Service [Member] | Permanent Placement Services [Member]
Revenues	$ 490	$ 495