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Statements of Comprehensive Loss - USD ($)
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Statement of Comprehensive Income [Abstract]    
Net loss $ (18,699,450) $ (12,090,287)
Other comprehensive income/(loss):    
Unrealized gain/(loss) on marketable securities 8,490 (8,361)
Total other comprehensive income/(loss) 8,490 (8,361)
Comprehensive loss $ (18,690,960) $ (12,098,648)