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Debt Schedule of Long-Term Debt Instruments (Details) - USD ($)	3 Months Ended					12 Months Ended
	Sep. 30, 2018	Jun. 24, 2018	Mar. 25, 2018	Dec. 24, 2017	Sep. 24, 2017	Sep. 30, 2018	Sep. 24, 2017	Sep. 25, 2016	Mar. 31, 2014	Mar. 30, 2014
Debt Instrument [Line Items]
Unamortized Debt Issuance Expense	$ 17,055,000					$ 17,055,000
Payments of Financing Costs						$ 437,000	$ 373,000	$ 422,000
Debt, Weighted Average Interest Rate	10.00%					10.00%
Debt, Long-term and Short-term, Combined Amount	$ 484,859,000				$ 548,385,000	$ 484,859,000	548,385,000
Debt Financing and Reorganization Costs Paid						437,000	373,000	422,000
Long-term Debt, Maturities, Repayments of Principal, Remainder of Fiscal Year	7,027,000					7,027,000
Long-term Debt, Maturities, Repayments of Principal in Year Two	0					0
Long-term Debt, Maturities, Repayments of Principal in Year Three	0					0
Long-term Debt, Maturities, Repayments of Principal in Year Four	385,000,000					385,000,000
Long-term Debt, Maturities, Repayments of Principal in Year Five	92,832,000					92,832,000
Long-term Debt, Current Maturities	7,027,000				30,182,000	7,027,000	30,182,000
Long-term Debt	460,777,000				496,379,000	460,777,000	496,379,000
Liquidity	$ 39,615,000					39,615,000
Repayments of Long-term Debt						$ 73,526,000	73,782,000	112,455,000
Class of Warrant or Right, Outstanding	6,000,000					6,000,000
Investment Warrants, Exercise Price						$ 4.19
Warrant liability fair value	$ 1,807,000				1,580,000	$ 1,807,000	1,580,000	11,760,000		$ 16,930,000
Amortization of Financing Costs						4,769,000	4,447,000	$ 5,541,000
Future Liquidity- Warrant Exercise Proceeds						25,140,000
Debt Instrument, Unamortized Discount (Premium) and Debt Issuance Costs, Net	(17,055,000)				(21,824,000)	(17,055,000)	(21,824,000)
Senior Notes [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount	$ 400,000,000					$ 400,000,000
Debt Instrument, Interest Rate at Period End	9.50%					9.50%
Debt, Long-term and Short-term, Combined Amount	$ 385,000,000				385,000,000	$ 385,000,000	385,000,000
Debt Instrument, Interest Rate, Stated Percentage	10.00%					10.00%
New 1st Lien Term Loan [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount	$ 250,000,000					$ 250,000,000
Debt, Long-term and Short-term, Combined Amount	$ 6,303,000				45,145,000	$ 6,303,000	45,145,000
Debt Instrument, Interest Rate, Stated Percentage	8.00%					8.00%
Debt Instrument, Unamortized Discount									$ 5,000,000
Repayments of Long-term Debt	$ 8,092,000	$ 10,250,000	$ 9,250,000	$ 11,250,000
Line of Credit [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount	40,000,000					$ 40,000,000
New Second Lien Loan [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount	$ 150,000,000					$ 150,000,000
Debt Instrument, Interest Rate at Period End	12.00%					12.00%
Debt, Long-term and Short-term, Combined Amount	$ 93,556,000				118,240,000	$ 93,556,000	118,240,000
Debt Instrument, Interest Rate, Stated Percentage	12.00%					12.00%
Common Stock Issued In Refinancing, Percent of Total On A Pro Forma Basis	10.00%					10.00%
Class of Warrant or Right, Outstanding	6,000,000					6,000,000
Revolving Line Of Credit [Member]
Debt Instrument [Line Items]
Debt, Long-term and Short-term, Combined Amount	$ 0				0	$ 0	$ 0
Debt Instrument, Interest Rate, Stated Percentage	6.00%					6.00%
Line of Credit Facility, Remaining Borrowing Capacity	$ 34,235,000					$ 34,235,000
2nd Lien Agreement [Member]
Debt Instrument [Line Items]
Common Stock Issued In Refinancing, Percent of Total On A Pro Forma Basis	13.00%					13.00%
Class of Warrant or Right, Outstanding	6,743,640					6,743,640
Federal Funds Rate [Member] \| New 1st Lien Term Loan [Member]
Debt Instrument [Line Items]
Base Interest Rate	0.50%					0.50%
Interest Rate Margin	5.25%					5.25%
Federal Funds Rate [Member] \| Revolving Line Of Credit [Member]
Debt Instrument [Line Items]
Interest Rate Margin	4.50%					4.50%
Prime Lending Rate [Member] \| New 1st Lien Term Loan [Member]
Debt Instrument [Line Items]
Base Interest Rate	2.00%					2.00%
30 Day LIBOR [Member] \| New 1st Lien Term Loan [Member]
Debt Instrument [Line Items]
Base Interest Rate	1.00%					1.00%
Interest Rate Margin	6.25%					6.25%
30 Day LIBOR [Member] \| Line of Credit [Member]
Debt Instrument [Line Items]
Base Interest Rate	0.50%					0.50%
30 Day LIBOR [Member] \| Revolving Line Of Credit [Member]
Debt Instrument [Line Items]
Interest Rate Margin	5.50%					5.50%
March 16, 2018 through March 15, 2019 [Member]
Debt Instrument [Line Items]
Debt Instrument, Redemption Price, Percentage of Principal Amount Redeemed						104.80%
March 15, 2019 through March 14, 2020 [Member]
Debt Instrument [Line Items]
Debt Instrument, Redemption Price, Percentage of Principal Amount Redeemed						102.40%
March 31, 2017 through March 31, 2018 [Member]
Debt Instrument [Line Items]
Debt Instrument, Redemption Price, Percentage of Principal Amount Redeemed						110.00%
March 31, 2018 through March 31, 2019 [Member]
Debt Instrument [Line Items]
Debt Instrument, Redemption Price, Percentage of Principal Amount Redeemed						100.00%
After March 31, 2019 [Member]
Debt Instrument [Line Items]
Debt Instrument, Redemption Price, Percentage of Principal Amount Redeemed						100.00%
Mandatory Payment [Member] \| New 1st Lien Term Loan [Member]
Debt Instrument [Line Items]
Repayments of Long-term Debt	$ 6,250,000	$ 6,250,000	$ 6,250,000	$ 6,250,000
Mandatory Payment [Member] \| 1st Lien Agreement [Member]
Debt Instrument [Line Items]
Debt Instrument, Periodic Payment, Principal					$ 6,250,000