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Income Taxes (Narrative) (Details) - USD ($) | 12 Months Ended |  |
--- | --- | --- | ---
Sep. 24, 2020 | Sep. 24, 2019 | Sep. 25, 2018 | Sep. 26, 2017 | Sep. 27, 2016 | Sep. 30, 2015 | Sep. 30, 2012 | Sep. 25, 2011
Operating Loss Carryforwards [Line Items] |  |  |  |  |  |  |  |
Net operating loss carry forwards |  | $ 8,994,000 |  |  |  |  |  | $ 1,686,000
Operating loss carry-forwards utilization limit |  |  |  |  |  |  | $ 160,000 |
General business tax credits | $ 3,618,000 | $ 3,618,000 | $ 3,618,000 | $ 3,618,000 | $ 3,618,000 | $ 3,618,000 |  |
Minimum [Member] |  |  |  |  |  |  |  |
Operating Loss Carryforwards [Line Items] |  |  |  |  |  |  |  |
Operating Loss Carryforwards, Expiration year |  | 2030 |  |  |  |  |  |
General business tax credits expiration year |  | 2034 |  |  |  |  |  |
Maximum [Member] |  |  |  |  |  |  |  |
Operating Loss Carryforwards [Line Items] |  |  |  |  |  |  |  |
Operating Loss Carryforwards, Expiration year |  | 2032 |  |  |  |  |  |
General business tax credits expiration year |  | 2039 |  |  |  |  |  |

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