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Net Loss per Share | 6 Months Ended
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Jun. 30, 2014
Net Loss per Share |
Net Loss per Share | 12. Net Loss per Share Diluted loss per share is the same as basic loss per share for all periods presented because the effects of potentially dilutive items were anti-dilutive given the Company’s net loss. The following securities have been excluded from the calculation of weighted average common shares outstanding because the effect is anti-dilutive:
|  | Three and Six Months Ended June 30, |
|  | 2013 |  | 2014 |
Redeemable convertible preferred stock: |  |  |  |  |
Series A |  | 10,033,976 |  | — |
Series B |  | 5,057,901 |  | — |
Series C |  | 4,429,601 |  | — |
Series D |  | 3,979,730 |  | — |
Warrants to purchase Series D redeemable convertible preferred stock |  | 12,797 |  | — |
Stock options |  | 5,604,989 |  | 6,388,908 |
Restricted stock units |  | — |  | 1,001,390 |
Basic and diluted net loss per share attributable to common stockholders is calculated as follows:
|  | Three Months Ended June 30, |  | Six Months Ended June 30, |
|  | 2013 |  | 2014 |  | 2013 |  | 2014 |
Numerator (in thousands): |  |  |  |  |  |  |  |  |
Net loss attributable to common stockholders |  | $ | (8,982 | ) | $ | (10,597 | ) | $ | (12,815 | ) | $ | (17,734 | )
Denominator: |  |  |  |  |  |  |  |  |
Weighted-average common shares outstanding, basic and diluted |  | 7,398,059 |  | 39,304,884 |  | 7,392,129 |  | 23,588,330 |
Net loss per share attributable to common stockholders, basic and diluted |  | $ | (1.21 | ) | $ | (0.27 | ) | $ | (1.73 | ) | $ | (0.75 | )

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