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NET INCOME (LOSS) PER SHARE | 6 Months Ended
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Jun. 30, 2022
Earnings Per Share [Abstract] |
NET INCOME (LOSS) PER SHARE | NET INCOME (LOSS) PER SHARE Basic net income (loss) per share is calculated by dividing the net income (loss) attributable to common shares by the weighted average number of common shares outstanding during the period. Diluted net income (loss) per common share is calculated by dividing the net income (loss) attributable to common shares by the weighted average number of common shares outstanding plus dilutive potential common shares outstanding during the period. ASU 2020-06 was adopted on January 1, 2022 and requires the Company to use the if-converted method to calculate the number of potentially dilutive shares for convertible debt. Under the if-converted method, adjustments are made to the diluted net income (loss) per common share calculation as if the Company had converted the convertible debt on the first day of each period presented. Adjustments to the numerator are made to add back the interest expense associated with the convertible debt on a post-tax basis. Adjustments to the denominator reflect the number of shares assumed to be convertible at the beginning of the period. For additional information regarding ASU 2020-06, see Note 2, Summary of Significant Accounting Policies. Prior to January 1, 2022, the Company used the treasury stock method to calculate dilutive shares on its convertible debt. Potential common shares include the shares of common stock issuable upon the exercise of outstanding stock options, the vesting of RSUs and the purchase of shares from the ESPP (using the treasury stock method), if applicable. Potential common shares are excluded from the diluted net income (loss) per share computation to the extent they would be antidilutive. The following table sets forth the computation of basic and diluted net income per common share for the three and six months ended June 30, 2022 and 2021 (in thousands, except per share amounts):
| Three Months Ended June 30, |  | Six Months Ended June 30,
2022 |  | 2021 |  | 2022 |  | 2021
Numerator: |  |  |  |  |  |  |
Net income—basic | $ | 19,876 |  |  | $ | 19,081 |  |  | $ | 26,704 |  |  | $ | 29,450 |
ASU 2020-06 convertible notes if-converted method adjustment | 1,039 |  |  | — |  |  | 2,078 |  |  | — |
Adjusted net income—diluted | 20,915 |  |  | 19,081 |  |  | 28,782 |  |  | 29,450 |
Denominator: |  |  |  |  |  |  |
Weighted average common shares outstanding—basic | 45,501 |  |  | 44,145 |  |  | 45,185 |  |  | 43,989 |
Computation of diluted securities: |  |  |  |  |  |  |
ASU 2020-06 convertible notes if-converted method adjustment | 5,607 |  |  | — |  |  | 5,607 |  |  | — |
Dilutive effect of stock options | 1,016 |  |  | 1,062 |  |  | 1,106 |  |  | 1,284 |
Dilutive effect of RSUs | 347 |  |  | 381 |  |  | 360 |  |  | 426 |
Dilutive effect of conversion premium on the 2022 Notes | — |  |  | — |  |  | — |  |  | 76 |
Dilutive effect of ESPP purchase options | 7 |  |  | 4 |  |  | 4 |  |  | 4 |
Weighted average common shares outstanding—diluted | 52,478 |  |  | 45,592 |  |  | 52,262 |  |  | 45,779 |
Net income per share: |  |  |  |  |  |  |
Basic net income per common share | $ | 0.44 |  |  | $ | 0.43 |  |  | $ | 0.59 |  |  | $ | 0.67 |
Diluted net income per common share | $ | 0.40 |  |  | $ | 0.42 |  |  | $ | 0.55 |  |  | $ | 0.64 |
The following table summarizes the outstanding stock options, RSUs and convertible senior notes that were excluded from the diluted net income per common share calculation because the effects of including these potential shares were antidilutive in the periods presented (in thousands):
| Three Months Ended June 30, |  | Six Months Ended June 30,
| 2022 |  | 2021 |  | 2022 |  | 2021
Weighted average number of stock options | 1,948 |  |  | 2,088 |  |  | 1,855 |  |  | 1,489 |
Convertible senior notes | — |  |  | — |  |  | 1,196 |  |  | — |
Weighted average number of RSUs | 31 |  |  | 26 |  |  | 24 |  |  | 14 |
Total | 1,979 |  |  | 2,114 |  |  | 3,075 |  |  | 1,503 |

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