Note 13 - Segment Information - Results of the Segments (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 30, 2024	Apr. 01, 2023	Dec. 30, 2023
Revenues	$ 71,939	$ 67,124
Cost of services	51,572	48,100
Gross profit	20,367	19,024
Selling, general and administrative	14,199	13,396
Depreciation and amortization of property and equipment	287	271
Amortization of acquired intangible assets	45	45
Operating income	5,836	5,707
Total assets	120,483	97,528	$ 120,484
Property and equipment acquired	669	332
Gain on sale of assets	0	(395)
Specialty Health Care [Member]
Revenues	38,182	39,130
Cost of services	27,108	27,458
Gross profit	11,074	11,672
Selling, general and administrative	7,490	7,216
Depreciation and amortization of property and equipment	104	108
Amortization of acquired intangible assets	0	0
Operating income	3,480	4,348
Total assets	43,666	40,477
Property and equipment acquired	107	18
Gain on sale of assets		0
Engineering [Member]
Revenues	23,505	18,490
Cost of services	18,003	14,444
Gross profit	5,502	4,046
Selling, general and administrative	4,173	3,913
Depreciation and amortization of property and equipment	145	127
Amortization of acquired intangible assets	0	0
Operating income	1,184	401
Total assets	50,579	36,065
Property and equipment acquired	199	288
Gain on sale of assets		(395)
Life Sciences and IT [Member]
Revenues	10,252	9,504
Cost of services	6,461	6,198
Gross profit	3,791	3,306
Selling, general and administrative	2,536	2,267
Depreciation and amortization of property and equipment	38	36
Amortization of acquired intangible assets	45	45
Operating income	1,172	958
Total assets	18,411	15,901
Property and equipment acquired	14	17
Gain on sale of assets		0
Corporate Segment [Member]
Revenues	0	0
Cost of services	0	0
Gross profit	0	0
Selling, general and administrative	0	0
Depreciation and amortization of property and equipment	0	0
Amortization of acquired intangible assets	0	0
Operating income	0	0
Total assets	7,827	5,085
Property and equipment acquired	$ 349	9
Gain on sale of assets		$ 0