The Company and Its Significant Accounting Policies Concentrations (Details)	12 Months Ended
	Sep. 27, 2015	Sep. 28, 2014	Sep. 29, 2013
Credit Concentration Risk [Member] | Accounts Receivable [Member]
Concentration Risk [Line Items]
Percentage of total	36.00%	53.00%
Number of customers	three customers/licensees	three customers/licensees
Customer one [Member] | Customer Concentration Risk [Member] | Revenue [Member]
Concentration Risk [Line Items]
Percentage of total	20.00%	28.00%	24.00%
Customer two [Member] | Customer Concentration Risk [Member] | Revenue [Member]
Concentration Risk [Line Items]
Percentage of total	25.00%	21.00%	19.00%