Note 3 - Revenue Recognition - Revenues Disaggregated by Revenue Source (Details) - USD ($) $ in Thousands	3 Months Ended
	Apr. 01, 2023	Apr. 02, 2022
Revenue	$ 67,124	$ 81,961
Health Care [Member]
Revenue	39,130	52,184
Engineering Services [Member]
Revenue	18,490	19,898
Technology Service [Member]
Revenue	9,504	9,879
Time-and-Materials Contract [Member] | Health Care [Member]
Revenue	38,834	52,023
Time-and-Materials Contract [Member] | Engineering Services [Member]
Revenue	10,470	10,675
Time-and-Materials Contract [Member] | Technology Service [Member]
Revenue	8,234	9,156
Permanent Placement Services [Member] | Health Care [Member]
Revenue	296	161
Permanent Placement Services [Member] | Technology Service [Member]
Revenue	114	177
Fixed-Price Contract [Member] | Engineering Services [Member]
Revenue	8,020	9,223
Fixed-Price Contract [Member] | Technology Service [Member]
Revenue	$ 1,156	$ 546