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Net Loss Per Share | 9 Months Ended
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Sep. 30, 2015
Net Loss Per Share. |
Net Loss Per Share | 11.Net Loss Per Share Basic net loss per share is calculated by dividing net loss by the weighted average shares outstanding during the period, without consideration for common stock equivalents. Diluted net loss per share is calculated by adjusting weighted average shares outstanding for the dilutive effect of common stock equivalents outstanding for the period, determined using the treasury-stock method. For purposes of the diluted net loss per share calculation, preferred stock, stock options, warrants to purchase Common Stock and warrants to purchase preferred stock are considered to be common stock equivalents but are excluded from the calculation of diluted net loss per share, as their effect would be anti-dilutive; therefore, basic and diluted net loss per share were the same for all periods presented. The following common stock equivalents were excluded from the calculation of diluted net loss per share for the periods indicated because including them would have had an anti-dilutive effect:
|  | Three Months Ended September 30, |  | Nine Months Ended September 30, |
|  | 2015 |  | 2014 |  | 2015 |  | 2014 |
Convertible preferred stock |  | — |  | 8,012,987 |  | — |  | 8,012,987 |
Stock options |  | 1,712,011 |  | 1,214,700 |  | 1,712,011 |  | 1,214,700 |
Common stock warrants |  | 59,405 |  | 34,839 |  | 59,405 |  | 34,839 |
Preferred stock warrants |  | — |  | 12,283 |  | — |  | 12,283 |
|  | 1,771,416 |  | 9,274,809 |  | 1,771,416 |  | 9,274,809 |

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