Debt (Details) (USD $)	3 Months Ended	9 Months Ended	12 Months Ended
	Sep. 27, 2013	Sep. 27, 2013	Dec. 28, 2012
Debt Instrument [Line Items]
Long-term debt, net of discount	$ 107,820,000	$ 107,820,000	$ 96,753,000
Warrants issued to purchase common stock (in hundredths)			19.90%
Maximum capital expenditures in 2013	10,000,000	10,000,000
Maximum capital expenditures in 2014	12,000,000	12,000,000
Maximum capital expenditures in 2015, and each fiscal year thereafter	14,000,000	14,000,000
Term loan commitment under a letter of agreement	23,000,000	23,000,000
Secured leverage and net debt leverage ratio requirements [Abstract]
Secured leverage ratio	13.00	13.00
Total net debt leverage ratio	14.00	14.00
Percentage of preferred stock that will convert to common stock (in hundredths)		67.90%
Preferred stock conversion ratio adjustment fair value	5,800,000	5,800,000
Restricted cash escrow related to credit agreement	500,000	500,000
Maximum [Member]
Debt Instrument [Line Items]
Aggregate capital expenditures	27,000,000	27,000,000	22,000,000
Oaktree Term Loans [Member]
Debt Instrument [Line Items]
Long-term debt, gross amount	110,919,000	110,919,000	103,514,000
Less: Oaktree term loan discount	(25,414,000)	(25,414,000)	(29,076,000)
Senior convertible notes exchange for term B loan			28,500,000
Oaktree term loans increased during period from PIK	7,400,000
Accrual related to interest in other long term liabilities	3,200,000	3,200,000
Common stock issued (in shares)			3,700,000
Preferred stock issued (in shares)		1,000
Oaktree Term A Loan [Member]
Debt Instrument [Line Items]
Long-term debt, gross amount			75,000,000
Coupon rate on senior notes (in hundredths)	12.00%	12.00%
Oaktree Term B Loan [Member]
Debt Instrument [Line Items]
Long-term debt, gross amount			28,500,000
Coupon rate on senior notes (in hundredths)	10.00%	10.00%
Senior Convertible Notes [Abstract]
Maximum percentage of par amount (in hundredths)	80.00%	80.00%
Senior Convertible Notes [Member]
Debt Instrument [Line Items]
Long-term debt, gross amount	22,315,000	22,315,000	22,315,000
Coupon rate on senior notes (in hundredths)	7.00%	7.00%
Senior Convertible Notes [Abstract]
Maturity date		Dec. 15, 2014
Frequency of periodic payment		semi-annually in arrears on June 15 and December 15 of each year
Conversion of stock (in shares)		15.66
Base amount consider for each convertible debt instrument	$ 1,000	$ 1,000
Repurchase price as a percentage of principal amount of notes being purchased ( in hundredths)	100.00%	100.00%