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Common Stock and Class B Common Stock (Details) - USD ($) | 12 Months Ended |  |  |
--- | --- | --- | --- | ---
Sep. 24, 2017 | Sep. 25, 2016 | Sep. 27, 2015 | Mar. 30, 2014
Common Stock, Effect of Plan of Reorganization [Line Items] |  |  |  |
Warrant liability fair value | $ 1,580,000 | $ 11,760,000 | $ 4,240,000 | $ 16,930,000
Sunset Level Provisions | 5,600,000 |  |  |
Investment Warrants, Exercise Price | $ 4.19 |  |  |
Class of Warrant or Right, Outstanding | 6,000,000 |  |  |
Before January 30, 2012 Refinancing [Member] |  |  |  |
Common Stock, Effect of Plan of Reorganization [Line Items] |  |  |  |
Common Stock, Par or Stated Value Per Share | $ 2.00 |  |  |
After January 30, 2012 Refinancing [Member] |  |  |  |
Common Stock, Effect of Plan of Reorganization [Line Items] |  |  |  |
Common Stock, Par or Stated Value Per Share | $ 0.01 |  |  |
2nd Lien Agreement [Member] |  |  |  |
Common Stock, Effect of Plan of Reorganization [Line Items] |  |  |  |
Common Stock Issued In Refinancing, Percent of Total On A Pro Forma Basis | 13.00% |  |  |
Class of Warrant or Right, Outstanding | 6,743,640 |  |  |
New Second Lien Loan [Member] |  |  |  |
Common Stock, Effect of Plan of Reorganization [Line Items] |  |  |  |
Common Stock Issued In Refinancing, Percent of Total On A Pro Forma Basis | 10.00% |  |  |
Class of Warrant or Right, Outstanding | 6,000,000 |  |  |

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