Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jul. 03, 2020	Jun. 28, 2019	Jul. 03, 2020	Jun. 28, 2019
Investments, Owned, Federal Income Tax Note [Line Items]
Effective Income Tax Rate Reconciliation, Percent	(7.50%)	0.40%	(8.00%)	(0.10%)
Income tax expense (benefit)	$ 1,750	$ (1,322)	$ 4,716	$ 346
Unrecognized tax benefit	300		$ 300
Effective tax rate			21.00%
Deferred tax assets	39,800		$ 39,800
Net Operating Loss Carryforward
Investments, Owned, Federal Income Tax Note [Line Items]
Increase to deferred tax valuation allowance	$ 1,400