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Consolidated Cash Flow Statements (Unaudited) (USD $)
 9 Months Ended
Sep. 28, 2014
Sep. 29, 2013
Cash flows from operating activities:    
Net income (loss) $ 863,000 $ (9,948,000)
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:    
Depreciation and amortization 7,987,000 9,355,000
Stock-based compensation expense 1,235,000 1,452,000
Deferred revenue recognized (6,493,000) (6,000,000)
Deferred loan costs recognized 58,000 58,000
Gain on sale of assets (4,000) (1,645,000)
Provision for excess and obsolete inventory 897,000 1,021,000
Goodwill impairment 0 6,900,000
Other noncash items (135,000) 549,000
Contributions to pension plans (907,000) (477,000)
Changes in operating assets and liabilities:    
Accounts receivable (23,041,000) (7,931,000)
Inventory (1,955,000) (4,656,000)
Other current assets (835,000) 535,000
Accounts payable 22,993,000 9,888,000
Accrued and other liabilities 5,376,000 31,000
Net cash provided by (used in) operating activities 6,039,000 (868,000)
Cash flows from investing activities:    
Capital expenditures, net (4,462,000) (3,092,000)
Proceeds from sale of assets 8,000 2,265,000
Net cash used in investing activities (4,454,000) (827,000)
Cash flows from financing activities:    
Net change in debt under revolving credit agreements 1,000,000 (5,974,000)
Common stock repurchases (357,000) (9,000)
Indirect repurchase of shares of minimum statutory tax withholdings (420,000) (565,000)
Cash dividends paid (1,225,000) (808,000)
Proceeds from issuance of common stock 4,000 0
Net cash used in financing activities (998,000) (7,356,000)
Net increase (decrease) in cash and cash equivalents 587,000 (9,051,000)
Cash and cash equivalents at beginning of period 18,674,000 18,664,000
Cash and cash equivalents at end of period $ 19,261,000 $ 9,613,000