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Note 5 - Intangible Assets - Schedule of Carrying Value of Intangible Assets (Details) - USD ($)
$ in Thousands
12 Months Ended
Jan. 01, 2023
Jan. 02, 2022
Net Carrying Amount $ 645  
Sensi ML [Member]    
Gross Carrying Amount 1,156 $ 1,156
Accumulated Amortization (511) (404)
Net Carrying Amount $ 645 $ 753
Sensi ML [Member] | Developed Technology Rights [Member]    
Finite-Lived Intangible Asset, Useful Life (Year) 6 years 7 years
Gross Carrying Amount $ 959 $ 959
Accumulated Amortization (383) (288)
Net Carrying Amount 576 672
Sensi ML [Member] | Customer Relationships [Member]    
Gross Carrying Amount 81 81
Accumulated Amortization (81) (81)
Net Carrying Amount $ 0 $ 0
Sensi ML [Member] | Trademarks and Trade Names [Member]    
Finite-Lived Intangible Asset, Useful Life (Year) 6 years 7 years
Gross Carrying Amount $ 116 $ 116
Accumulated Amortization (47) (35)
Net Carrying Amount $ 69 $ 81