Supplemental Financial Information - Narrative (Details) - USD ($) $ in Millions	3 Months Ended
	Jan. 04, 2020	Dec. 29, 2018
Product Warranty Liability [Line Items]
Shipping and handling revenues	$ 3.5	$ 3.3
Shipping and handling cost of goods sold	$ 3.1	$ 3.0
Warrants outstanding (in shares)	683,674
Common stock shares that may be called by warrants (in shares)	341,837
Minimum
Product Warranty Liability [Line Items]
Extended product warranty, period	2 years
Maximum
Product Warranty Liability [Line Items]
Extended product warranty, period	5 years