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Note 5 - Balance Sheet Components (Details Textual) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 28, 2025
Sep. 29, 2024
Sep. 28, 2025
Sep. 28, 2025
Sep. 29, 2024
Dec. 29, 2024
Depreciation, Amortization and Accretion, Net     $ 3,943   $ 2,595  
Interest Costs Capitalized $ 0 $ 0   $ 0 0  
Capitalized Computer Software, Amortization 46 20   116 48  
Continuing Operations [Member]            
Depreciation, Amortization and Accretion, Net 1,400 900   3,900 2,200  
Tooling [Member]            
Preproduction Costs Related to Long-term Supply Arrangements, Costs Capitalized in Period 0 $ 1,070   4,070 $ 5,350  
Die Wafers [Member]            
Inventory, Work in Process, Gross 400   400 400   $ 500
Unmarked Devices [Member]            
Inventory, Work in Process, Gross $ 900   $ 900 $ 900   $ 1,000