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Composition of Certain Financial Statement Items Concentrations (Details) - Sales - Customer Concentration Risk
3 Months Ended
Dec. 26, 2021
Dec. 27, 2020
Customer/licensee (x)    
Concentration Risk    
Concentration Risk, Percentage 26.00% 34.00%
Customer/licensee (y)    
Concentration Risk    
Concentration Risk, Percentage 19.00% 13.00%
Customer/licensee (z)    
Concentration Risk    
Concentration Risk, Percentage   10.00%