Summary Of Significant Accounting Policies (Concentration of Risk Narrative)(Details)	6 Months Ended		12 Months Ended
	Apr. 29, 2017 customer	Apr. 30, 2016 customer	Oct. 29, 2016 customer
Concentration Risk
Number of Financial Institutions	8
Customer Concentration Risk | Accounts Receivable
Concentration Risk
Concentration Risk, Percentage	36.00%		42.00%
Number Of Customers Included In Concentration Disclosures	2		2
Customer Concentration Risk | Accounts Receivable | Major Customer One
Concentration Risk
Concentration Risk, Percentage	23.00%		29.00%
Customer Concentration Risk | Accounts Receivable | Major Customer Two
Concentration Risk
Concentration Risk, Percentage	13.00%		13.00%
Customer Concentration Risk | Sales Revenue, Segment
Concentration Risk
Concentration Risk, Percentage	27.00%	30.00%
Number Of Customers Included In Concentration Disclosures	2	2
Customer Concentration Risk | Sales Revenue, Segment | Major Customer One
Concentration Risk
Concentration Risk, Percentage	16.00%	19.00%
Customer Concentration Risk | Sales Revenue, Segment | Major Customer Two
Concentration Risk
Concentration Risk, Percentage	11.00%	11.00%