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Note 7 - Goodwill - Changes in Carrying Amount of Goodwill (Details) - USD ($)
$ in Thousands
12 Months Ended
Jan. 01, 2022
Jan. 02, 2021
Balance $ 16,354 $ 16,354
No change 0 0
Balance 16,354 16,354
Engineering [Member]    
Balance 11,918 11,918
No change   0
Balance 11,918 11,918
Specialty Health Care [Member]    
Balance 2,398 2,398
No change   0
Balance 2,398 2,398
Information Technology [Member]    
Balance 2,038 2,038
No change   0
Balance $ 2,038 $ 2,038