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Note 7 - Goodwill - Changes in Carrying Amount of Goodwill (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 30, 2023
Dec. 31, 2022
Jan. 01, 2022
Balance $ 22,147 $ 16,354 $ 16,354
No change 0   0
Acquisition of TalentHerder   5,793  
Balance 22,147 22,147 16,354
Engineering [Member]      
Balance 11,918 11,918 11,918
No change 0   0
Acquisition of TalentHerder   0  
Balance 11,918 11,918 11,918
Specialty Health Care [Member]      
Balance 2,398 2,398 2,398
No change 0   0
Acquisition of TalentHerder   0  
Balance 2,398 2,398 2,398
Information Technology [Member]      
Balance 7,831 2,038 2,038
No change 0   0
Acquisition of TalentHerder   5,793  
Balance $ 7,831 $ 7,831 $ 2,038