Quarterly report pursuant to Section 13 or 15(d)

Statements of Comprehensive Loss

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Statements of Comprehensive Loss - USD ($)
3 Months Ended 6 Months Ended
Jun. 30, 2015
Jun. 30, 2014
Jun. 30, 2015
Jun. 30, 2014
Statement of Comprehensive Income [Abstract]        
Net loss $ (7,116,340) $ (3,801,923) $ (11,968,103) $ (9,014,735)
Other comprehensive loss:        
Net unrealized loss on available-for-sale securities (27,915)   (75,621)  
Comprehensive loss $ (7,144,255) $ (3,801,923) $ (12,043,724) $ (9,014,735)