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Note 3 - Discontinued Operations (Details Textual) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 28, 2025
Sep. 29, 2024
Sep. 28, 2025
Sep. 29, 2024
Dec. 29, 2024
Capitalized Computer Software, Amortization $ 46 $ 20 $ 116 $ 48  
Restructuring Charges 0 0 75 0  
Sensi ML [Member] | Discontinued Operations [Member]          
Disposal Group, Including Discontinued Operation, Depreciation and Amortization 0 200   600  
Capitalized Computer Software, Amortization   167   494  
Disposal Group, Including Discontinued Operation, Accounts, Allowance for Credit Losses 31   31   $ 30
Restructuring Charges 0   162    
Disposal Group, Including Discontinued Operation, Deferred Revenue, Current 0   0   $ 10
Contract with Customer, Liability, Revenue Recognized     10    
Disposal Group, Including Discontinued Operation, Share-based Payment Arrangement Expense 0 (105) (32) 147  
Disposal Group, Including Discontinued Operation, Share-bsed Payment Arrangement Expense, Capitalized 0 40 0 82  
Sensi ML [Member] | Discontinued Operations [Member] | RSUs and PRSUs [Member]          
Disposal Group, Including Discontinued Operation, Share-based Payment Arrangement Expense 0 (66) (32) 88  
Sensi ML [Member] | Discontinued Operations [Member] | Share-Based Payment Arrangement, Option [Member]          
Disposal Group, Including Discontinued Operation, Share-based Payment Arrangement Expense $ 0 $ 0 $ 0 $ 2