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Goodwill and other Intangible Assets Business Combinations (Details) - USD ($) | 12 Months Ended
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Sep. 24, 2017 | Sep. 25, 2016
Acquired Finite-Lived Intangible Assets [Line Items] |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment | $ 100,000 |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill [Abstract] |  |
Goodwill |  | $ 0
2017 Acquisition [Member] |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill [Abstract] |  |
Goodwill | 2,445,000 |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Liabilities, Current | $ 1,056,000 |

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