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Summary of Significant Accounting Policies (Tables)
 6 Months Ended
Jun. 30, 2013
Accounting Policies [Abstract]  
Schedule Of Earning Loss Per Share Potentially Dilutive Securities [Table Text Block]
The table below represents a list of potentially dilutive securities outstanding as of June 30, 2013 and 2012:
 
 
 
June 30,
 
 
 
2013
 
2012
 
 
 
 
 
 
 
 
 
Series D convertible preferred stock warrants
 
 
3,388,677
 
 
3,388,677
 
Conversion of Series D preferred stock
 
 
-
 
 
6,358,872
 
Series E convertible preferred stock warrants
 
 
3,412,721
 
 
3,127,344
 
Conversion of Series E preferred stock
 
 
-
 
 
6,254,680
 
Stock options
 
 
12,850,141
 
 
2,726,137
 
Warrants issued in connection with Secured Promissory Notes
 
 
492,620
 
 
87,720
 
Warrants issued in connection with recap
 
 
34,436,447
 
 
-
 
Other outstanding warrants
 
 
759,287
 
 
780,787
 
Potentially dilutive securities oustanding
 
 
55,339,893
 
 
22,724,217