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Note 9 - Information Concerning Product Lines, Geographic Information and Revenue Concentration (Details Textual) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jul. 03, 2022
Jul. 04, 2021
Jul. 03, 2022
Jul. 04, 2021
Apr. 03, 2022
Jan. 02, 2022
Revenue from Contract with Customer, Excluding Assessed Tax $ 4,541 $ 2,882 $ 8,637 $ 5,122    
Contract with Customer, Liability, Current 142   142     $ 455
North America [Member]            
Revenue from Contract with Customer, Excluding Assessed Tax $ 3,082 $ 565 $ 5,515 $ 1,824    
Percentage of Revenue 67.00% 19.00% 63.00% 35.00%    
"eFPGA IP" Property Licenses [Member]            
Revenue from Contract with Customer, Excluding Assessed Tax $ 1,617 $ 150 $ 3,188 $ 150    
Professional Services [Member]            
Revenue from Contract with Customer, Excluding Assessed Tax 1,500 23 3,100 23    
Contract with Customer, Liability, Current         $ 0 $ 300
IP Revenue [Member]            
Revenue from Contract with Customer, Excluding Assessed Tax $ 100 $ 125 $ 100 $ 125