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Note 1 - Basis of Presentation (Details Textual) - Sell-through Distributors Concentration Risk [Member]
3 Months Ended 6 Months Ended 12 Months Ended
Jul. 02, 2022
Jul. 03, 2021
Jul. 02, 2022
Jul. 03, 2021
Jan. 01, 2022
Revenue Benchmark [Member]          
Number of Distributors     2    
Revenue Benchmark [Member] | Distributors [Member]          
Concentration Risk, Percentage 89.00% 88.00% 90.00% 87.00%  
Accounts Receivable [Member] | Large Distributor One [Member]          
Concentration Risk, Percentage     42.00%   59.00%
Accounts Receivable [Member] | Large Distributor Two [Member]          
Concentration Risk, Percentage     40.00%   28.00%