Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 27, 2014	Jun. 28, 2013
Cash flows from operating activities:
Net loss	$ (16,870)	$ (12,350)
Adjustment to reconcile net loss to net cash provided by (used in) operating activities:
Depreciation and amortization	3,631	3,611
Stock incentive plan expense	743	1,002
Amortization and write-off of deferred loan costs	1,542	764
Amortization of debt discount	2,665	2,378
Payment-in-kind interest on debt	7,498	6,056
Change in fair value on warrant liability	0	2,878
Severance, impairment and other associated costs, net of cash payments	1,306	(553)
Other, net	566	623
Changes in assets and liabilities:
Accounts receivable	(2,461)	485
Inventory	5,705	547
Prepaid expenses and other current assets	1,401	924
Accounts payable and accrued expenses	(1,673)	(7,053)
Net cash provided by (used in) operating activities	4,053	(688)
Cash flows from investing activities:
Capital expenditures	(1,423)	(5,717)
Proceeds from sale of assets	402	133
Net cash used in investing activities	(1,021)	(5,584)
Cash flows from financing activities:
Principal repayments of debt	(3,956)	0
Debt issuance costs	(1,631)	(1,519)
Taxes paid related to net share settlement of equity awards	(47)	0
Change in restricted cash	500	(500)
Net cash used in financing activities	(5,134)	(2,019)
Net effect of exchange rate changes on cash	(26)	(21)
Net decrease in cash and cash equivalents	(2,128)	(8,312)
Cash and cash equivalents at beginning of period	26,902	31,475
Cash and cash equivalents at end of period	24,774	23,163
Supplemental cash flows disclosures of non-cash investing and financing activity:
Capital expenditures included in accounts payable and accrued liabilities	517	660
Debt issuance costs included in accounts payable and accrued liabilities	2,186	1,060
Conversion of senior convertible notes to common stock	$ 3,477	$ 0