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Net Income (Loss) Per Share | 6 Months Ended
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Jun. 30, 2020
Earnings Per Share [Abstract] |
Net Income (Loss) Per Share | Net Income (Loss) Per ShareBasic net income (loss) per share is computed by dividing net income (loss) by the weighted-average number of shares of common stock outstanding during the period. Diluted net income (loss) per share is computed by giving effect to all potential shares of common stock, including stock options, restricted stock units (RSUs), performance-based restricted stock units (PSUs), and shares related to convertible senior notes, to the extent dilutive. The following table sets forth the computation of basic and diluted net income (loss) per share (in thousands, except per share amounts):
| Three Months Ended June 30, |  |  |  | Six Months Ended June 30, |  |
| 2020 |  | 2019 |  | 2020 |  | 2019
Numerator: |  |  |  |  |  |  |
Net income (loss) | $ | 10,589 |  |  | $ | (2,029) |  |  | $ | 4,876 |  |  | $ | (6,347) |
Denominator: |  |  |  |  |  |  |
Weighted average shares used to compute net income (loss) per share, basic | 123,842 |  |  | 118,790 |  |  | 123,135 |  |  | 117,766 |
Options to purchase common stock | 958 |  |  | — |  |  | 1,013 |  |  | — |
RSUs and PSUs | 2,707 |  |  | — |  |  | 3,175 |  |  | — |
Shares related to convertible senior notes | 6,344 |  |  | — |  |  | 5,351 |  |  | — |
Weighted average shares used to compute net income (loss) per share, diluted | 133,851 |  |  | 118,790 |  |  | 132,674 |  |  | 117,766 |
Net income (loss) per share, basic | $ | 0.09 |  |  | $ | (0.02) |  |  | $ | 0.04 |  |  | $ | (0.05) |
Net income (loss) per share, diluted | $ | 0.08 |  |  | $ | (0.02) |  |  | $ | 0.04 |  |  | $ | (0.05) |
The following potential weighted-average shares of common stock outstanding were excluded from the computation of diluted net income (loss) per share because including them would have been anti-dilutive (in thousands):
| Three Months Ended June 30, |  |  |  | Six Months Ended June 30, |  |
| 2020 |  | 2019 |  | 2020 |  | 2019
Options to purchase common stock | — |  |  | 2,753 |  |  | — |  |  | 3,006 |
RSUs and PSUs | 103 |  |  | 3,787 |  |  | 52 |  |  | 5,394 |
Shares related to convertible senior notes | — |  |  | 3,646 |  |  | — |  |  | 3,494 |
Employee stock purchase plan | 10 |  |  | — |  |  | 10 |  |  | — |
Total common stock equivalents | 113 |  |  | 10,186 |  |  | 62 |  |  | 11,894 |
Shares related to convertible senior notes represents the dilutive and anti-dilutive impact of our issuance of $345 million in aggregate principal amount of our 2023 notes as the average price of our common stock was higher than the conversion price of $26.95 and the conditions for conversion had been met. These shares were dilutive during the three and six months ended June 30, 2020 as we were in a net income position and anti-dilutive during the three and six months ended June 30, 2019 as we were in a net loss position. However, as a result of the capped call transactions, there will be no economic dilution from the 2023 notes up to $40.68, as exercise of the capped call instruments will reduce dilution from the 2023 notes that would have otherwise occurred when the average price of our common stock exceeds the conversion price. None of the shares related to our issuance of $800 million in aggregate principal amount of our 2025 notes were dilutive or anti-dilutive during the three and six months ended June 30, 2020 and 2019

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