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Consolidated Cash Flow Statements (Unaudited) (USD $)
 6 Months Ended
Jun. 29, 2014
Jun. 30, 2013
Cash flows from operating activities:    
Net income (loss) $ 2,022,000 $ (7,953,000)
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:    
Depreciation and amortization 5,396,000 6,168,000
Stock-based compensation expense 914,000 1,002,000
Deferred revenue recognized (4,329,000) (4,000,000)
Deferred loan costs recognized 39,000 39,000
Gain on sale of assets (4,000) (1,682,000)
Provision for excess and obsolete inventory 445,000 926,000
Goodwill impairment 0 6,900,000
Other noncash items 81,000 472,000
Contributions to pension plans (441,000) (217,000)
Changes in operating assets and liabilities:    
Accounts receivable (26,343,000) (14,375,000)
Inventory (1,032,000) (5,121,000)
Other current assets 755,000 931,000
Accounts payable 23,581,000 16,101,000
Accrued and other liabilities 3,593,000 (144,000)
Net cash provided by (used in) operating activities 4,677,000 (953,000)
Cash flows from investing activities:    
Capital expenditures, net (2,474,000) (1,526,000)
Proceeds from sale of assets 8,000 2,160,000
Net cash (used in) provided by investing activities (2,466,000) 634,000
Cash flows from financing activities:    
Net change in debt under revolving credit agreements (1,000,000) 1,000,000
Common stock repurchases (236,000) 0
Indirect repurchase of shares of minimum statutory tax withholdings (419,000) (554,000)
Cash dividends paid (814,000) (400,000)
Proceeds from issuance of common stock 4,000 0
Net cash (used in) provided by financing activities (2,465,000) 46,000
Net decrease in cash and cash equivalents (254,000) (273,000)
Cash and cash equivalents at beginning of period 18,674,000 18,664,000
Cash and cash equivalents at end of period $ 18,420,000 $ 18,391,000