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Note 13 - Segment Information - Results of the Segments (Details) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 29, 2025
Mar. 30, 2024
Dec. 28, 2024
Revenues $ 84,473 $ 71,939  
Cost of services 62,495 51,572  
Gross profit 21,978 20,367  
Selling, general and administrative 14,971 14,199  
Depreciation and amortization of property and equipment 424 287  
Amortization of acquired intangible assets 0 45  
Operating income 6,583 5,836  
Total assets 120,992 120,483 $ 132,077
Property and equipment acquired 427 669  
Specialty Health Care [Member]      
Revenues 43,283 38,182  
Cost of services 31,080 27,108  
Gross profit 12,203 11,074  
Selling, general and administrative 8,311 7,490  
Depreciation and amortization of property and equipment 160 104  
Amortization of acquired intangible assets 0 0  
Operating income 3,732 3,480  
Total assets 16,121 43,666  
Property and equipment acquired 35 107  
Engineering [Member]      
Revenues 32,142 23,505  
Cost of services 25,957 18,003  
Gross profit 6,185 5,502  
Selling, general and administrative 4,741 4,173  
Depreciation and amortization of property and equipment 212 145  
Amortization of acquired intangible assets 0 0  
Operating income 1,232 1,184  
Total assets 47,485 50,579  
Property and equipment acquired 66 199  
Life Sciences, Data & Solutions [Member]      
Revenues 9,048 10,252  
Cost of services 5,458 6,461  
Gross profit 3,590 3,791  
Selling, general and administrative 1,919 2,536  
Depreciation and amortization of property and equipment 52 38  
Amortization of acquired intangible assets 0 45  
Operating income 1,619 1,172  
Total assets 44,206 18,411  
Property and equipment acquired 54 14  
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 13,180 7,827  
Property and equipment acquired $ 272 $ 349