Net Loss Attributable to Common Stockholders | 3. NET LOSS ATTRIBUTABLE TO COMMON STOCKHOLDERS Net loss attributable to common stockholders The following table summarizes the computation of basic and diluted net loss per share attributable to common stockholders of the Company: Three Months Ended September 30, Nine Months Ended September 30, 2015 2014 2015 2014 Numerator: Basic Net loss and comprehensive loss $ (3,365,687 ) $ (2,009,206 ) $ (7,734,431 ) $ (2,742,580 ) Accretion of preferred stock — — — (333,082 ) Deemed dividend — — — (4,053,570 ) Net loss attributable to common stockholders – basic $ (3,365,687 ) $ (2,009,206 ) $ (7,734,431 ) $ (7,129,232 ) Diluted Net loss attributable to common stockholders – basic (3,365,687 ) (2,009,206 ) (7,734,431 ) (7,129,232 ) Less: change in fair value of derivative liabilities — — — (2,327,502 ) Net loss available to common stockholders – diluted $ (3,365,687 ) $ (2,009,206 ) $ (7,734,431 ) $ (9,456,734 ) Denominator: Basic Weighted-average number of common shares – basic 9,712,521 5,565,415 8,270,405 3,229,338 Diluted Weighted-average number of common shares – basic 9,712,521 5,565,415 8,270,405 3,229,338 Warrants to purchase preferred stock (treasury stock) — — — 43,392 Total weighted average number of common shares – diluted 9,712,521 5,565,415 8,270,405 3,272,730 Net loss per share: Basic $ (0.35 ) $ (0.36 ) $ (0.94 ) $ (2.21 ) Diluted $ (0.35 ) $ (0.36 ) $ (0.94 ) $ (2.89 ) The following potentially dilutive securities outstanding, prior to use of the treasury stock method or if-converted method, have been excluded from the computation of diluted weighted-average shares outstanding, because such securities had an antidilutive impact: Three Months ended September 30, Nine Months ended September 30, 2015 2014 2015 2014 Options to purchase common stock 1,077,330 874,032 1,077,300 874,032 Warrants to purchase common stock 1,384,608 60,000 1,384,608 60,000 Total of common stock equivalents 2,461,938 934,032 2,461,908 934,032 |