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Consolidated Statements of Cash Flows (Unaudited) (USD $)
 3 Months Ended
Mar. 31, 2013
Apr. 01, 2012
Cash flows from operating activities:    
Net (loss) income $ (6,459,000) $ 5,288,000
Loss from discontinued operations 0 (223,000)
(Loss) income from continuing operations (6,459,000) 5,511,000
Adjustments to reconcile net (loss) income to net cash provided by (used in) operating activities:    
Depreciation and amortization 3,073,000 3,073,000
Stock-based compensation expense 388,000 439,000
Deferred revenue recognized 2,000,000 1,973,000
Deferred loan costs recognized 19,000 19,000
Gain on sale of assets (1,665,000) (2,612,000)
Provision for excess and obsolete inventory 280,000 409,000
Goodwill impairment 6,900,000 0
Other noncash items 812,000 901,000
Contributions to pension plans (11,000) (446,000)
Changes in operating assets and liabilities:    
Accounts receivable (14,344,000) (17,719,000)
Inventory (2,799,000) (5,649,000)
Other current assets 202,000 (554,000)
Accounts payable 17,545,000 12,193,000
Accrued and other liabilities (1,362,000) 5,928,000
Net cash provided by (used in) operating activities 579,000 (480,000)
Cash flows from investing activities:    
Capital expenditures, net (945,000) (1,444,000)
Proceeds from sale of assets 2,141,000 4,481,000
Other 0 (90,000)
Net cash provided by investing activities 1,196,000 2,947,000
Cash flows from financing activities:    
Net change in debt under revolving credit agreements (1,500,000) (1,000,000)
Common stock repurchases 0 (11,000)
Indirect repurchase of shares of minimum statutory tax withholdings (451,000) (457,000)
Net cash used in financing activities (1,951,000) (1,468,000)
Net (decrease) increase in cash and cash equivalents (176,000) 999,000
Cash and cash equivalents at beginning of period 18,664,000 18,173,000
Cash and cash equivalents at end of period $ 18,488,000 $ 19,172,000