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Consolidated Statements of Cash Flows - USD ($)
 12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Cash flows from operating activities:    
Net (loss) income $ (10,822,000) $ 6,043,000
Adjustments to reconcile net (loss) income to net cash used in operating activities:    
Depreciation and amortization 3,884,000 6,288,000
Deferred income taxes (667,000) 0
Non-cash compensation 730,000 1,372,000
Deferred loan costs amortized 60,000 2,261,000
Loss on extinguishment of debt 0 1,521,000
Net gain on sale of assets (2,668,000) (33,626,000)
Provision for excess and obsolete inventory 116,000 880,000
Other noncash items (32,000) (1,440,000)
Changes in operating assets and liabilities:    
Accounts receivable (1,419,000) 4,072,000
Inventory (3,204,000) (1,809,000)
Prepaid expenses and other assets 951,000 (81,000)
Accounts payable 3,491,000 (4,610,000)
Accrued and other liabilities 121,000 (175,000)
Net cash used in operating activities (9,459,000) (19,304,000)
Cash flows from investing activities:    
Capital expenditures (1,637,000) (1,763,000)
Proceeds from sale of assets 2,801,000 51,581,000
Change in restricted cash 1,500,000 (1,500,000)
Net cash provided by investing activities 2,664,000 48,318,000
Cash flows from financing activities:    
Repayment of term loan 0 (11,714,000)
Repayment of revolving credit agreement 0 (2,132,000)
Penalty paid on early extinguishment of debt 0 (1,521,000)
Proceeds from related party note payable 0 1,000,000
Debt issuance and modification costs 0 (379,000)
Capital lease payments (208,000) (156,000)
Indirect repurchase of shares for minimum statutory tax withholdings (123,000) (191,000)
Net cash used in financing activities (331,000) (15,093,000)
Net (decrease) increase in cash and cash equivalents (7,126,000) 13,921,000
Cash and cash equivalents at beginning of year 15,270,000 1,349,000
Cash and cash equivalents at end of year 8,144,000 15,270,000
Supplemental disclosure of cash flow information:    
Expenditures funded by capital lease borrowings $ 1,277,000 $ 0