Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended
Apr. 04, 2015	Mar. 29, 2014
Cash Flows from Operating Activities
Net (Loss) Income	$ (1,973)us-gaap_NetIncomeLoss	$ 5,159us-gaap_NetIncomeLoss
Adjustments to Reconcile Net (Loss) Income to Net Cash Provided by (Used in) Operating Activities
Depreciation and amortization	6,914us-gaap_DepreciationAndAmortization	7,426us-gaap_DepreciationAndAmortization
Stock-based compensation expense	1,624us-gaap_ShareBasedCompensation	364us-gaap_ShareBasedCompensation
Deferred income taxes	751	(604)
Excess tax benefits from stock-based compensation	(109)	(124)
Recovery of doubtful accounts	(62)	(62)
Other	643us-gaap_OtherNoncashIncomeExpense	(757)us-gaap_OtherNoncashIncomeExpense
Changes in Assets and Liabilities:
Accounts receivable	210	(8,599)
Inventories	1,399us-gaap_IncreaseDecreaseInInventories	(8,388)us-gaap_IncreaseDecreaseInInventories
Production cost of contracts	95	513
Other assets	4,412	5,440
Accounts payable	342	(4,138)
Accrued and other liabilities	(10,761)	(6,067)
Net Cash Provided by (Used in) Operating Activities	3,485	(9,837)
Cash Flows from Investing Activities
Purchases of property and equipment	(5,572)	(2,192)
Proceeds from sale of assets	9	5
Net Cash Used in Investing Activities	(5,563)	(2,187)
Cash Flows from Financing Activities
Repayment of term loan and other debt	(10,006)us-gaap_RepaymentsOfDebt	(7,506)us-gaap_RepaymentsOfDebt
Excess tax benefits from stock-based compensation	109	124
Net proceeds from issuance of common stock under stock plans	(947)	7
Net Cash Used in Financing Activities	(10,844)	(7,375)
Net Decrease in Cash and Cash Equivalents	(12,922)	(19,399)
Cash and Cash Equivalents at Beginning of Period	45,627	48,814
Cash and Cash Equivalents at End of Period	32,705	29,415
Supplemental Disclosures of Cash Flow Information
Interest paid	11,397us-gaap_InterestPaid	11,397us-gaap_InterestPaid
Taxes paid	0us-gaap_IncomeTaxesPaid	58us-gaap_IncomeTaxesPaid
Non-cash activities:
Purchases of property and equipment not paid	$ 714	$ 182

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