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Defined contribution plans	9 Months Ended
Defined contribution plans	Jun. 29, 2019
Retirement Benefits [Abstract]
Defined contribution plans	Defined contribution plans The Company has a defined contribution 401(k) plan (the "401(k) Plan") for the Company’s U.S.-based employees, as well as defined contribution plans for employees in Germany, France and Netherlands. In the second quarter of fiscal 2019, the Company began making contributions towards the 401(k) Plan, as well as towards the defined contribution plans in Germany, France and Netherlands.