Income Taxes (Details) - USD ($) $ in Thousands	6 Months Ended
Mar. 26, 2019	Mar. 27, 2018
Income Tax Examination [Line Items]
Deferred tax assets	$ 0	$ 0
Income tax provision or benefit	$ 0	$ 0
Effective income tax rate	0.00%	0.00%
Reserves for uncertain tax positions	$ 0	$ 0
Accrual for interest and penalties	$ 0	$ 0
Minimum [Member]
Income Tax Examination [Line Items]
Years subject to income tax examination	2015
Maximum [Member]
Income Tax Examination [Line Items]
Years subject to income tax examination	2018

Amount after allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards.

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Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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The amount of estimated penalties and interest accrued as of the balance sheet date arising from income tax examinations.

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Tax year being audited in the income tax examination, in CCYY format.

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Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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Amount recognized for uncertainty in income taxes classified as current.

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