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Income Taxes (Schedule of Deferred Tax Assets and Liabilities) (Details) - Long Term [Member] - USD ($) $ in Thousands | Sep. 28, 2021 | Sep. 29, 2020
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Deferred income tax assets (liabilities): |  |
Tax effect of net operating loss carry-forward | $ 4,061 | $ 2,686
General business credits | 4,353 | 3,618
Partnership/joint venture basis differences | (5) | (2)
Deferred revenue | 65 | 80
Property and Equipment basis differences | (1,764) | (1,866)
Intangibles basis differences | 678 | 1,087
ROU asset | (9,804) | (10,516)
Long-term lease liability | 11,782 | 12,549
Other accrued liability and asset difference | 5 | (232)
Deferred tax assets | 9,371 | 7,404
Less valuation allowance | (9,371) | (7,404)
Net deferred tax asset (liabilities) |  |

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