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Income Taxes (Details) - USD ($)
$ in Thousands
9 Months Ended
Jun. 25, 2019
Jun. 26, 2018
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 2016  
Maximum [Member]    
Income Tax Examination [Line Items]    
Years subject to income tax examination 2018