Income Taxes (Details) - USD ($) $ in Thousands	9 Months Ended
	Jun. 29, 2021	Jun. 30, 2020
Income Tax Examination [Line Items]
Deferred tax assets	$ 0
Income tax provision or benefit	$ 0	$ 0
Effective income tax rate	0.00%	0.00%
Reserves for uncertain tax positions	$ 0
Accrual for interest and penalties	$ 0
Minimum [Member]
Income Tax Examination [Line Items]
Years subject to income tax examination	2018
Maximum [Member]
Income Tax Examination [Line Items]
Years subject to income tax examination	2021