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Consolidated Statements of Stockholders' (Deficit) Equity (USD $)
In Thousands, except Share data
Total
Series A Preferred Stock
Series B Preferred Stock
Common Stock
Additional Paid-in Capital
Accumulated Other Comprehensive Income (loss)
Accumulated Deficit
Beginning Balance at Dec. 31, 2010 $ (9,864)       $ 22 $ 102,360 $ (63) $ (112,183)
Beginning Balances, Shares at Dec. 31, 2010         21,817,000      
Stock option and warrant compensation expense to employees, directors and vendors 550          550      
Common stock issued upon exercise of common stock warrants 515       1 514      
Common Stock Issued Upon Exercise Of Common Stock Warrants Shares       543,000      
Proceeds from sale of common stock, net of offering costs 10,787       3 10,784      
Proceeds from sale of common stock, net of offering costs, Shares         3,000,000      
Reclassification of derivative liabilities to additional paid-in capital 20,075          20,075      
Fair value of warrants issued in connection with issuance of 2011 senior secured convertible debt 937          937      
Exchange of Series A preferred stock for common stock                     
Exchange of Series A Preferred Stock for common stock, shares         40,000      
Exchange of Series B preferred stock for common stock                     
Exchange of Series B Preferred Stock for common stock, shares         6,000      
Common stock issued upon conversion of outstanding convertible debt and accrued and bonus income 7,622       7 7,615      
Common stock issued upon conversion of outstanding convertible debt and accrued and bonus income, shares         7,313,000      
Common stock issued for settlement of accrued expenses 120          120      
Common stock issued for settlement of accrued expenses, shares         60,000      
Foreign currency translation adjustment 76             76   
Net loss (17,145)             (17,145)
Ending Balance at Dec. 31, 2011 13,673       33 142,955 13 (129,328)
Ending Balances, shares at Dec. 31, 2011         32,779,000      
Stock option and warrant compensation expense to employees, directors and vendors 3,499          3,499      
Common stock issued upon exercise of common stock warrants 223       223    
Common Stock Issued Upon Exercise Of Common Stock Warrants Shares       550,000      
Exchange of Series B preferred stock for common stock                     
Exchange of Series B Preferred Stock for common stock, shares         2,000      
Foreign currency translation adjustment (8)             (8)   
Net loss (9,287)           (9,287)
Ending Balance at Dec. 31, 2012 8,100       33 146,677 5 (138,615)
Ending Balances, shares at Dec. 31, 2012         33,331,000      
Stock option and warrant compensation expense to employees, directors and vendors 2,656          2,656      
Common stock issued upon exercise of common stock warrants 714      3 711    
Common Stock Issued Upon Exercise Of Common Stock Warrants Shares       3,152,000      
Common stock issued upon exercise of common stock options 1,060         1,060      
Common stock issued upon exercise of common stock options, Shares         241,000      
Proceeds from sale of common stock, net of offering costs 6,892       2 6,890      
Proceeds from sale of common stock, net of offering costs, Shares         1,169,000      
Exchange of Series A preferred stock for common stock                  
Exchange of Series A Preferred Stock for common stock, shares         40,000       
Exchange of Series B preferred stock for common stock                  
Exchange of Series B Preferred Stock for common stock, shares         1,000       
Foreign currency translation adjustment 6            6  
Net loss (13,080)              (13,080)
Ending Balance at Dec. 31, 2013 $ 6,348       $ 38 $ 157,994 $ 11 $ (151,695)
Ending Balances, shares at Dec. 31, 2013         37,934,000