Quarterly report pursuant to Section 13 or 15(d)

Preferred Stock (Tables)

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Preferred Stock (Tables)
6 Months Ended
Jun. 30, 2015
Equity [Abstract]  
Schedule of Preferred Stock Disclosure [Table Text Block]
As of December 31, 2014, the number of convertible preferred shares outstanding is as follows:
 
 
 
December 31,
 
 
 
2014
 
Series A convertible preferred stock
 
 
2,483,692
 
Series B convertible preferred stock
 
 
8,073,508
 
Series C convertible preferred stock
 
 
3,351,156
 
Series D convertible preferred stock
 
 
19,557,392
 
Total preferred shares
 
 
33,465,748