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Note 12 - Information Concerning Product Lines, Geographic Information, and Revenue Concentration (Details Textual) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 29, 2024
Oct. 01, 2023
Sep. 29, 2024
Oct. 01, 2023
Dec. 31, 2023
Revenue from Contract with Customer, Excluding Assessed Tax $ 4,273 $ 6,665 $ 14,407 $ 13,719  
Contract with Customer, Liability, Current 449   449   $ 1,052
UNITED STATES          
Revenue from Contract with Customer, Excluding Assessed Tax $ 3,700 $ 6,000 $ 12,000 $ 11,700  
Percentage of Revenue 85.00% 91.00% 83.00% 85.00%  
eFPGA Revenue [Member]          
Revenue from Contract with Customer, Excluding Assessed Tax $ 3,400 $ 5,800 $ 10,000 $ 10,500  
Professional Services [Member]          
Contract with Customer, Asset, after Allowance for Credit Loss 2,300 4,000 2,300 4,000  
Contract with Customer, Liability, Current 400 $ 300 400 $ 300 $ 1,100
Contract with Customer, Liability, Revenue Recognized     1,000    
Revenue, Remaining Performance Obligation, Amount $ 1,200   $ 1,200