Note 1 - Summary of Significant Accounting Policies - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 30, 2023	Dec. 31, 2022	Jan. 01, 2022
Revenue	$ 263,237	$ 284,680	$ 203,875
Health Care [Member]
Revenue	136,241	159,448	98,495
Health Care [Member] | Time-and-Materials Contract [Member]
Revenue	134,941	158,001	97,363
Health Care [Member] | Permanent Placement Services [Member]
Revenue	1,300	1,447	1,132
Engineering Services [Member]
Revenue	84,675	85,937	66,172
Engineering Services [Member] | Time-and-Materials Contract [Member]
Revenue	42,443	44,915	33,937
Engineering Services [Member] | Permanent Placement Services [Member]
Revenue	0	1	67
Engineering Services [Member] | Fixed-Price Contract [Member]
Revenue	42,232	41,021	32,168
Technology Service [Member]
Revenue	42,321	39,295	39,208
Technology Service [Member] | Time-and-Materials Contract [Member]
Revenue	35,368	35,473	37,181
Technology Service [Member] | Permanent Placement Services [Member]
Revenue	402	800	637
Technology Service [Member] | Fixed-Price Contract [Member]
Revenue	$ 6,551	$ 3,022	$ 1,390