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Net income (loss) per share attributable to common stockholders | 9 Months Ended
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Sep. 30, 2013
Net income (loss) per share attributable to common stockholders |
Net income (loss) per share attributable to common stockholders | 12. Net income (loss) per share attributable to common stockholders The following table sets forth the computation of basic and diluted net income (loss) per share attributable to common stockholders:
|  | Three Months Ended September 30, |  | Nine Months Ended September 30, |
|  | 2013 |  | 2012 |  | 2013 |  | 2012 |
|  | (in thousands) |
Numerator: |  |  |  |  |  |  |  |  |
Net income (loss) attributable to common stockholders, basic and diluted |  | $ | 354 |  | $ | 2,777 |  | $ | (1,166 | ) | $ | 5,895 |
Denominator: |  |  |  |  |  |  |  |  |
Weighted average common stock, basic |  | 35,593 |  | 35,080 |  | 35,620 |  | 34,618 |
Dilutive effect of stock options |  | 1,347 |  | 2,257 |  | — |  | 2,706 |
Dilutive effect of RSUs |  | 189 |  | — |  | — |  | — |
Weighted average common stock, dilutive |  | 37,129 |  | 37,337 |  | 35,620 |  | 37,324 |
Net income (loss) per share attributable to common stockholders: |  |  |  |  |  |  |  |  |
Basic |  | $ | 0.01 |  | $ | 0.08 |  | $ | (0.03 | ) | $ | 0.17 |
Diluted |  | $ | 0.01 |  | $ | 0.07 |  | $ | (0.03 | ) | $ | 0.16 |
For the three months ended September 30, 2013, 3,086,287 options to purchase common stock were not included in the computation of diluted net income per share as the inclusion would have been anti-dilutive. For the nine months ended September 30, 2013, we excluded all stock options and RSUs from the computation of diluted net loss per share due to the net loss for the period. For the three and nine months ended September 30, 2012, 2,478,156 and 2,442,898, respectively, options to purchase common stock were not included in the computation of diluted net income per share as the inclusion would have been anti-dilutive.

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