Leases - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended
	Dec. 27, 2019	Oct. 01, 2019
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Operating lease assets	$ 42,812
Operating lease, liability	44,121
Lease, cost	3,914
Accounting Standards Update 2016-02
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Operating lease assets		$ 45,519
Operating lease, liability		46,941
ASU 2016-02 modified retrospective adoption		(1,053)
Cost of sales
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Lease, cost	2,755
Selling, General and Administrative Expenses
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Lease, cost	$ 1,159
Accumulated Deficit | Accounting Standards Update 2016-02
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
ASU 2016-02 modified retrospective adoption		$ (1,053)