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Consolidated Cash Flow Statements (Unaudited) - USD ($)
 3 Months Ended
Apr. 01, 2018
Apr. 02, 2017
Cash flows from operating activities:    
Net loss $ (1,795,000) $ (3,308,000)
Adjustments to reconcile net loss to net cash used in operating activities:    
Depreciation and amortization 672,000 1,016,000
Stock-based compensation expense 143,000 175,000
Deferred loan costs recognized 3,000 15,000
Gain on the sale of assets (281,000) (2,416,000)
Provision for excess and obsolete inventory (75,000) 35,000
Other noncash items 68,000 507,000
Contributions to pension plans (11,000) 0
Changes in operating assets and liabilities:    
Accounts receivable (675,000) (1,041,000)
Inventory 78,000 (5,027,000)
Other current assets (667,000) 413,000
Accounts payable 1,047,000 5,729,000
Accrued and other liabilities 847,000 3,062,000
Net cash used in operating activities (646,000) (840,000)
Cash flows from investing activities:    
Capital expenditures, net (406,000) (176,000)
Proceeds from sale of assets 363,000 2,502,000
Net cash (used in) provided by investing activities (43,000) 2,326,000
Cash flows from financing activities:    
Capital lease payments (425,000) (37,000)
Indirect repurchase of shares of minimum statutory tax withholdings 0 (2,000)
Net cash used in financing activities (425,000) (39,000)
Net (decrease) increase in cash and cash equivalents (1,114,000) 1,447,000
Cash and cash equivalents at beginning of period 8,144,000 15,270,000
Cash and cash equivalents at end of period $ 7,030,000 $ 16,717,000