Annual report pursuant to Section 13 and 15(d)

Concentration of Credit Risk and Significant Customers and Suppliers - Additional Information (Detail)

v3.10.0.1
Concentration of Credit Risk and Significant Customers and Suppliers - Additional Information (Detail)
12 Months Ended
Sep. 29, 2018
Sep. 30, 2017
Sep. 24, 2016
Concentration Risk [Line Items]      
Percentage of net sales 48.00% 44.00% 42.00%
Percentage of accounts receivable 46.00% 44.00%  
Percentage of accounts receivable including Company's largest customer 14.00% 10.00%  
Percentage of cost of goods sold 8.00% 9.00% 9.00%
Sales Revenue, Net | Customer Concentration Risk | Customer One      
Concentration Risk [Line Items]      
Percentage of largest customer accounted of the Company's net sales 16.00% 16.00% 15.00%
Sales Revenue, Net | Customer Concentration Risk | Customer Two      
Concentration Risk [Line Items]      
Percentage of largest customer accounted of the Company's net sales 11.00% 8.00% 8.00%
Sales Revenue, Net | Customer Concentration Risk | Customer Three      
Concentration Risk [Line Items]      
Percentage of largest customer accounted of the Company's net sales 8.00% 8.00% 8.00%