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Fair Value Measurements Fair Value Measurements (Details) - USD ($)
12 Months Ended
Sep. 30, 2018
Sep. 24, 2017
Sep. 25, 2016
Mar. 30, 2014
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Fair Value, Estimate Not Practicable, Investments $ 6,318,000      
Tangible Asset Impairment Charges 267,000 $ 482,000 $ 1,367,000  
Debt, Long-term and Short-term, Combined Amount 484,859,000 548,385,000    
Warrant liability fair value 1,807,000 1,580,000 11,760,000 $ 16,930,000
Fair Value, Option, Changes in Fair Value, Gain (Loss) $ 226,000 $ (10,181,000) $ 7,519,000  
Warrant [Member]        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate 3130.00% 3700.00% 6300.00%  
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate 291.00% 181.00% 125.00%  
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value $ 0.30 $ 0.26 $ 1.96  
2nd Lien Agreement [Member]        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Long-term Debt, Fair Value $ 95,427,120      
1st Lien Agreement [Member]        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Long-term Debt, Fair Value 6,299,060      
Senior Notes [Member]        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Long-term Debt, Fair Value 399,206,500      
Debt, Long-term and Short-term, Combined Amount 385,000,000 $ 385,000,000    
New Second Lien Loan [Member]        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Debt, Long-term and Short-term, Combined Amount $ 93,556,000 $ 118,240,000