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Income Taxes (Schedule of Deferred Tax Assets and Liabilities) (Details) - USD ($) $ in Thousands | Sep. 26, 2017 | Sep. 27, 2016
--- | --- | ---
Current [Member] |  |  |
Deferred assets (liabilities): |  |  |
Tax effect of net operating loss carry-forward |  | $ 0 | $ 0
General business credits |  | 0 | 0
Partnership/Joint Venture basis differences |  | 0 | 0
Deferred revenue |  | 0 | 0
Property and equipment basis differences |  | 0 | 0
Intangibles basis differences |  | 0 | 0
Other accrued liability and asset difference |  | 117 | 112
Net deferred tax assets |  | 117 | 112
Less valuation allowance | [1] | (117) | (112)
Net deferred tax assets |  | 0 | 0
Long Term [Member] |  |  |
Deferred assets (liabilities): |  |  |
Tax effect of net operating loss carry-forward |  | 4,084 | 2,926
General business credits |  | 1,378 | 680
Partnership/Joint Venture basis differences |  | (126) | (15)
Deferred revenue |  | 75 | 79
Property and equipment basis differences |  | (859) | (567)
Intangibles basis differences |  | (705) | (190)
Other accrued liability and asset difference |  | 1,454 | 1,199
Net deferred tax assets |  | 5,301 | 4,112
Less valuation allowance | [1] | (5,301) | (4,112)
Net deferred tax assets |  | $ 0 | $ 0
[1] | The valuation allowance increased by $1,194,000 during the year ended September 26, 2017.

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