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CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2016
Mar. 31, 2015
Cash flows from operating activities    
Net (loss) $ (1,944) $ (876)
Adjustments to reconcile net loss to net cash used in operating activities:    
Depreciation and amortization 182 217
Provision for inventory obsolescence 409 $ (77)
Gain on disposal of property and equipment, net 6
Stock-based compensation 176 $ 118
Non cash other (income) loss - warrants (87) $ (1,444)
Benefit (provision) for deferred taxes (14)
Changes in current assets and liabilities:    
Trade receivables (216) $ 594
Prepaid expenses (18) (207)
Inventories (1,013) (327)
Deposits and other assets 39 (99)
Accounts payable 328 323
Accrued and other liabilities (115) (13)
Net cash used in operating activities (2,267) (1,791)
Cash flows from investing activities    
Purchases of property and equipment (21) (254)
Net cash used in investing activities $ (21) (254)
Cash flows from financing activities    
Proceeds from stock options/warrants exercised 177
Change in restricted cash 60
Change in mortgage note payable $ (61) (60)
Proceeds from issuance of common shares, net 11,531
Net cash provided by (used in) financing activities $ (61) 11,708
Net change in cash and cash equivalents (2,349) 9,663
Cash and cash equivalents, beginning of period 11,805 5,733
Cash and cash equivalents, end of period 9,456 15,396
Cash paid for:    
Interest paid, net $ 38 $ 40
Income taxes