Property Plant and Equipment - Components of Property, Plant and Equipment (Detail) - USD ($) $ in Thousands	Oct. 02, 2020	Sep. 27, 2019
Property, Plant and Equipment [Line Items]
Total property and equipment	$ 284,716	$ 281,834
Less accumulated depreciation and amortization	(165,850)	(149,187)
Property and equipment — net	118,866	132,647
Construction in process
Property, Plant and Equipment [Line Items]
Total property and equipment	16,174	24,848
Machinery and equipment
Property, Plant and Equipment [Line Items]
Total property and equipment	191,953	175,696
Leasehold improvements
Property, Plant and Equipment [Line Items]
Total property and equipment	19,854	12,962
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Total property and equipment	2,659	3,716
Computer equipment and software
Property, Plant and Equipment [Line Items]
Total property and equipment	18,487	18,116
Capital lease and financed assets
Property, Plant and Equipment [Line Items]
Total property and equipment	0	46,496
Less accumulated depreciation and amortization	(2,500)	(5,300)
Finance lease assets
Property, Plant and Equipment [Line Items]
Total property and equipment	$ 35,589	$ 0