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Condensed Consolidated Statements of Cash Flows (USD $)
In Thousands, unless otherwise specified
 9 Months Ended
Sep. 30, 2013
Sep. 30, 2012
Operating Activities:    
Net loss $ (2,642) $ (4,215)
Adjustments to reconcile net loss to net cash used in operating activities    
Depreciation and amortization 168 223
Stock-based compensation expense 341 377
Issuance of common stock for services 10 152
Issuance of warrants for services   71
Amortization of warrants issued for debt issuance costs   3
Provision for doubtful accounts (7)  
Change in operating assets and liabilities:    
Accounts receivable (6) 201
Inventories 32 (24)
Prepaid expenses and other current assets (74) 38
Other assets 1 20
Accounts payable (115) (31)
Deferred revenue 180 (85)
Accrued liabilities (8) 107
Net cash used in operating activities (2,120) (3,163)
Investing activities    
Purchases of property and equipment (23) (36)
Net cash used in investing activities (23) (36)
Financing activities    
Payments on capital leases   (41)
Repayment of line of credit - bank (400)  
Proceeds from the issuance of common stock 1,374 1,198
Proceeds from the sale of common stock under associate stock purchase plan 21 51
Net cash provided by financing activities 995 1,208
Effect of Exchange Rate Changes on Cash (1) (22)
Decrease in Cash and Cash Equivalents (1,149) (2,013)
Cash and Cash Equivalents, beginning of period 2,252 5,478
Cash and Cash Equivalents, end of period $ 1,103 $ 3,465