Quarterly report pursuant to Section 13 or 15(d)

STOCKHOLDERS' EQUITY (Tables)

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STOCKHOLDERS' EQUITY (Tables)
6 Months Ended
Jun. 30, 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 June 30, 2012. 

 

Offering   Number of Shares
Issuable Upon
Exercise of
Outstanding
Warrants
    Exercise
Price
    Expiration Date  
                   
June 2012 Public Offering     2,981,440     $       1.25       June 13, 2017  
June 2012 Public Offering     5,420,800     $       1.00       September 11, 2012  
December 2011 Underwritten Offering     9,248,334     $       0.60       December 6, 2016  
April 2011 Private Placement     6,465,352     $       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     24,339,800                          

 

(1)  The exercise prices of these warrants are subject to adjustment for “down-rounds” and have been accounted for as derivative instruments as described in Note 2.