Note 1 - Summary of Significant Accounting Policies - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Jan. 01, 2022	Jan. 02, 2021
Revenue	$ 284,680	$ 203,875	$ 150,409
Health Care [Member]
Revenue	159,448	98,495	60,481
Health Care [Member] | Time-and-Materials Contract [Member]
Revenue	158,001	97,363	59,692
Health Care [Member] | Permanent Placement Services [Member]
Revenue	1,447	1,132	789
Engineering Services [Member]
Revenue	85,937	66,172	57,715
Engineering Services [Member] | Time-and-Materials Contract [Member]
Revenue	44,915	33,937	28,323
Engineering Services [Member] | Permanent Placement Services [Member]
Revenue	1	67	211
Engineering Services [Member] | Fixed-Price Contract [Member]
Revenue	41,021	32,168	29,181
Technology Service [Member]
Revenue	39,295	39,208	32,213
Technology Service [Member] | Time-and-Materials Contract [Member]
Revenue	35,473	37,181	31,263
Technology Service [Member] | Permanent Placement Services [Member]
Revenue	800	637	490
Technology Service [Member] | Fixed-Price Contract [Member]
Revenue	$ 3,022	$ 1,390	$ 460