Segment Information (Concentration) (Details)	12 Months Ended
	Sep. 28, 2018	Sep. 29, 2017	Sep. 30, 2016
Credit Concentration Risk [Member]
Concentration Risk [Line Items]
Accounts receivable from major customers percentage	66.00%	53.00%	54.00%
Company A [Member] | Customer Concentration Risk [Member]
Concentration Risk [Line Items]
Revenue from major customers percentage	47.00%	39.00%	40.00%
Company B [Member] | Customer Concentration Risk [Member]
Concentration Risk [Line Items]
Revenue from major customers percentage		12.00%	10.00%
Company C [Member] [Domain] | Customer Concentration Risk [Member]
Concentration Risk [Line Items]
Revenue from major customers percentage		10.00%