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Consolidated Cash Flow Statements (Unaudited) (USD $)
 3 Months Ended
Mar. 30, 2014
Mar. 31, 2013
Cash flows from operating activities:    
Net income (loss) $ 1,652,000 $ (6,459,000)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:    
Depreciation and amortization 2,714,000 3,073,000
Stock-based compensation expense 405,000 388,000
Deferred revenue recognized (2,164,000) (2,000,000)
Deferred loan costs recognized 19,000 19,000
Gain on sale of assets (4,000) (1,665,000)
Provision for excess and obsolete inventory 103,000 280,000
Goodwill impairment 0 6,900,000
Other noncash items 117,000 812,000
Contributions to pension plans (199,000) (11,000)
Changes in operating assets and liabilities:    
Accounts receivable (19,953,000) (14,344,000)
Inventory (2,247,000) (2,799,000)
Other current assets 1,662,000 202,000
Accounts payable 17,925,000 17,545,000
Accrued and other liabilities 2,469,000 (1,362,000)
Net cash provided by operating activities 2,499,000 579,000
Cash flows from investing activities:    
Capital expenditures, net (559,000) (945,000)
Proceeds from sale of assets 8,000 2,141,000
Net cash (used in) provided by investing activities (551,000) 1,196,000
Cash flows from financing activities:    
Net change in debt under revolving credit agreements (1,000,000) (1,500,000)
Common stock repurchases (116,000) 0
Indirect repurchase of shares of minimum statutory tax withholdings (33,000) (451,000)
Cash dividends paid (408,000) 0
Net cash used in financing activities (1,557,000) (1,951,000)
Net increase (decrease) in cash and cash equivalents 391,000 (176,000)
Cash and cash equivalents at beginning of period 18,674,000 18,664,000
Cash and cash equivalents at end of period $ 19,065,000 $ 18,488,000