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Note 9 - Information Concerning Product Lines, Geographic Information and Revenue Concentration - Customer and Distributor Concentration (Details) - Customer Concentration Risk [Member]
3 Months Ended
Apr. 03, 2022
Jan. 02, 2022
Apr. 03, 2022
Apr. 04, 2021
Distributor "A" [Member] | Accounts Receivable [Member]        
Concentration risk percentage 24.00% 42.00%    
Distributor "A" [Member] | Revenue Benchmark [Member]        
Concentration risk percentage     11.00% 12.00%
Distributor "C" [Member] | Accounts Receivable [Member]        
Concentration risk percentage 21.00% 17.00%    
Distributor "C" [Member] | Revenue Benchmark [Member]        
Concentration risk percentage     10.00% 23.00%
Distributor "E" [Member] | Accounts Receivable [Member]        
Concentration risk percentage 25.00% 22.00%    
Distributor "E" [Member] | Revenue Benchmark [Member]        
Concentration risk percentage     30.00% 29.00%
Distributor "J" [Member] | Accounts Receivable [Member]        
Concentration risk percentage 27.00%      
Customer "O" [Member] | Accounts Receivable [Member]        
Concentration risk percentage   10.00%    
Customer "O" [Member] | Revenue Benchmark [Member]        
Concentration risk percentage     27.00% 13.00%
Distributor "F" [Member] | Revenue Benchmark [Member]        
Concentration risk percentage       29.00%
Customer "N" [Member] | Revenue Benchmark [Member]        
Concentration risk percentage     17.00% 13.00%
Customer P [Member] | Revenue Benchmark [Member]        
Concentration risk percentage     23.00%