Note 3 - Revenue Recognition - Revenues Disaggregated by Revenue Source (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 29, 2024	Jul. 01, 2023	Jun. 29, 2024	Jul. 01, 2023
Revenue	$ 69,164	$ 67,035	$ 141,103	$ 134,159
Health Care [Member]
Revenue	36,932	35,528	75,114	74,658
Engineering Services [Member]
Revenue	22,508	21,014	46,013	39,504
Technology Service [Member]
Revenue	9,724	10,493	19,976	19,997
Time-and-Materials Contract [Member] | Health Care [Member]
Revenue	36,612	35,276	74,416	74,110
Time-and-Materials Contract [Member] | Engineering Services [Member]
Revenue	11,221	11,557	22,463	22,027
Time-and-Materials Contract [Member] | Technology Service [Member]
Revenue	7,690	8,624	16,823	16,858
Permanent Placement Services [Member] | Health Care [Member]
Revenue	320	252	698	548
Permanent Placement Services [Member] | Technology Service [Member]
Revenue	38	133	111	247
Fixed-Price Contract [Member] | Engineering Services [Member]
Revenue	11,287	9,457	23,550	17,477
Fixed-Price Contract [Member] | Technology Service [Member]
Revenue	$ 1,996	$ 1,736	$ 3,042	$ 2,892