Note 3 - Revenue Recognition - Revenues Disaggregated by Revenue Source (Details) - USD ($) $ in Thousands	3 Months Ended
	Apr. 02, 2022	Apr. 03, 2021
Revenue	$ 81,961	$ 44,549
Engineering Services [Member]
Revenue	19,898	14,466
Health Care [Member]
Revenue	52,184	21,137
Technology Service [Member]
Revenue	9,879	8,946
Time-and-Materials Contract [Member] | Engineering Services [Member]
Revenue	12,949	10,478
Time-and-Materials Contract [Member] | Health Care [Member]
Revenue	52,023	20,933
Time-and-Materials Contract [Member] | Technology Service [Member]
Revenue	9,702	8,796
Fixed-Price Contract [Member] | Engineering Services [Member]
Revenue	6,949	3,921
Permanent Placement Services [Member] | Engineering Services [Member]
Revenue	0	67
Permanent Placement Services [Member] | Health Care [Member]
Revenue	161	204
Permanent Placement Services [Member] | Technology Service [Member]
Revenue	$ 177	$ 150