Annual report pursuant to Section 13 and 15(d)

STOCKHOLDERS' EQUITY (Tables)

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STOCKHOLDERS' EQUITY (Tables)
12 Months Ended
Dec. 31, 2012
Equity [Abstract]  
Schedule of Stockholders' Equity Note, Warrants or Rights [Table Text Block]

The following table summarizes information with regard to outstanding warrants to purchase common stock as of December 31, 2012. 

 

Offering   Number of Shares
Issuable Upon
Exercise of
Outstanding
Warrants
    Exercise
Price
   

 

 

Expiration Date

                     
November 2012 Private Placement     2,000,000     $ 1.00     January 31, 2013
November 2012 Private Placement     1,000,000     $ 1.25     November 2, 2017
June 2012 Public Offering     2,981,440     $ 1.25     June 13, 2017
December 2011 Underwritten Offering     9,248,334     $ 0.60     December 6, 2016
April 2011 Private Placement     6,058,811     $ 0.75     March 31, 2016
Legacy warrants (1)     27,310     $ 0.60     July 27, 2015
Legacy warrants     105,040     $ 16.065     July 27, 2015
Legacy warrants     91,524     $ 99.45-100.98     December 31, 2015
                     
Total     21,512,459              

 

(1)  The exercise prices of these warrants are subject to adjustment for “down-rounds” and the warrants have been accounted for as derivative instruments as described in Note 3.

Reserved For Future Issuance Upon Exercise Of Stock Options and Warrants Or Conversion Of Debt [Table Text Block]

The following shares were reserved for future issuance upon exercise of stock options and warrants:

 

    December 31,  
    2012     2011  
             
Warrants     21,512,459       17,403,989  
Stock options     6,439,188       4,827,638  
                 
Total number of shares reserved for future issuance     27,951,647       22,231,627