Income Taxes - Provision for Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
Sep. 30, 2017	Sep. 24, 2016	Sep. 26, 2015
Current [Abstract]
Federal	$ 13	$ 7	$ 23
State and local	446	581	677
Total current taxes	459	588	700
Deferred [Abstract]
Deferred	0	0	0
Provision for income taxes - current and deferred	$ 459	$ 588	$ 700

Amount of current federal tax expense (benefit) pertaining to income (loss) from continuing operations.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
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-Section S99
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Amount of current income tax expense (benefit) pertaining to taxable income (loss) from continuing operations.

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Amount of current state and local tax expense (benefit) pertaining to income (loss) from continuing operations.

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Amount of deferred income tax expense (benefit) pertaining to income (loss) from continuing operations.

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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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