Note 3 - Revenue Recognition - Revenues Disaggregated by Revenue Source (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 29, 2025	Mar. 30, 2024
Revenue	$ 84,473	$ 71,939
Health Care [Member]
Revenue	43,283	38,182
Engineering Services [Member]
Revenue	32,142	23,505
Technology Service [Member]
Revenue	9,048	10,252
Time-and-Materials Contract [Member] | Health Care [Member]
Revenue	42,872	37,804
Time-and-Materials Contract [Member] | Engineering Services [Member]
Revenue	14,507	11,242
Time-and-Materials Contract [Member] | Technology Service [Member]
Revenue	6,030	9,133
Permanent Placement Services [Member] | Health Care [Member]
Revenue	411	378
Permanent Placement Services [Member] | Technology Service [Member]
Revenue	71	73
Fixed-Price Contract [Member] | Engineering Services [Member]
Revenue	17,635	12,263
Fixed-Price Contract [Member] | Technology Service [Member]
Revenue	$ 2,947	$ 1,046