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Statements of Operations and Comprehensive Loss - USD ($)
3 Months Ended 6 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Jun. 30, 2017
Jun. 30, 2016
Statements of Operations and Comprehensive (Loss) Income        
Revenue
Costs and expenses:        
Research and development expense 5,722,070 5,781,176 11,600,578 11,299,898
General and administrative expense 2,521,805 2,312,207 4,614,105 4,368,560
Total costs and expenses 8,243,875 8,093,383 16,214,683 15,668,458
Loss from operations (8,243,875) (8,093,383) (16,214,683) (15,668,458)
Other income 102,079 21,813 141,574 41,910
Net loss and comprehensive loss $ (8,141,796) $ (8,071,570) $ (16,073,109) $ (15,626,548)
Basic and diluted net loss per common share (in dollars per share) $ (0.30) $ (0.41) $ (0.63) $ (0.80)
Basic and diluted weighted average number of common shares (in shares) 27,239,902 19,793,202 25,360,167 19,432,520