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CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) (USD $)
In Thousands, unless otherwise specified
 9 Months Ended
Sep. 30, 2014
Sep. 30, 2013
Cash flows from operating activities    
Net loss $ (12,092) $ (1,870)
Adjustments to reconcile net loss to net cash used in operating activities:    
Depreciation and amortization 656 620
Provision for inventory obsolescence 985 40
Gain on disposal of property and equipment, net 11 (3)
Stock-based compensation 278 348
Change in fair value of liabilities 9,820 (17)
(benefit) for deferred taxes (1,900) (1,075)
Changes in current assets and liabilities:    
Trade receivables (56) 778
Prepaid expenses (58) 277
Inventories 947 (1,022)
Deposits and other assets 729 (363)
Accounts payable 311 368
Accrued and other liabilities (246) 730
Net cash used in operating activities (615) (1,189)
Cash flows from investing activities    
Purchases of property and equipment (319) (417)
Net cash used in investing activities (319) (417)
Cash flows from financing activities    
Proceeds from stock options exercised 249 48
Change in restricted cash (898)   
Proceeds from mortgage note payable 3,472 (103)
Repayment of industrial revenue bonds (3,257)   
Repurchase of warrants (421)   
Net cash used in financing activities (855) (55)
Net change in cash and cash equivalents (1,789) (1,661)
Cash and cash equivalents, beginning of period 7,924 4,162
Cash and cash equivalents, end of period 6,135 2,501
Cash paid during the nine months ended September 30, 2014 and 2013 for:    
Interest 111 171
Income taxes