Note 3 - Revenue Recognition - Revenues Disaggregated by Revenue Source (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 01, 2022	Oct. 02, 2021	Oct. 01, 2022	Oct. 02, 2021
Revenue	$ 58,152	$ 45,471	$ 214,459	$ 138,953
Engineering Services [Member]
Revenue	20,922	16,482	61,726	47,882
Health Care [Member]
Revenue	27,997	19,646	123,638	63,723
Technology Service [Member]
Revenue	9,233	9,343	29,095	27,348
Time-and-Materials Contract [Member] | Engineering Services [Member]
Revenue	7,181	3,516	33,920	25,815
Time-and-Materials Contract [Member] | Health Care [Member]
Revenue	27,495	19,324	122,563	62,985
Time-and-Materials Contract [Member] | Technology Service [Member]
Revenue	7,008	8,011	26,506	25,672
Fixed-Price Contract [Member] | Engineering Services [Member]
Revenue	13,741	12,966	27,806	22,000
Fixed-Price Contract [Member] | Technology Service [Member]
Revenue	2,058	1,098	2,058	1,098
Permanent Placement Services [Member] | Engineering Services [Member]
Revenue	0	0	0	67
Permanent Placement Services [Member] | Health Care [Member]
Revenue	502	322	1,075	738
Permanent Placement Services [Member] | Technology Service [Member]
Revenue	$ 167	$ 234	$ 531	$ 578