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Net Income (Loss) Per Share Attributable to Common Shareholders | 12 Months Ended
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Dec. 31, 2021
Earnings Per Share [Abstract] |
Net Income (Loss) Per Share Attributable to Common Shareholders | 12. Net Income (Loss) Per Share Attributable to Common Shareholders Basic net income (loss) per share is calculated by dividing net income (loss) attributable to common shareholders by the weighted-average number of common shares outstanding during the period. Diluted net income (loss) per share is calculated by dividing the net income (loss) attributable to common shareholders by the weighted-average number of common share equivalents outstanding for the period, including any dilutive effect from outstanding stock options and warrants using the treasury stock method. The Company’s net income (loss) is net income (loss) attributable to common shareholders for all periods presented. The following table sets forth the computation of basic and diluted net income (loss) per share for the periods ended (in thousands, except share and per share amounts):
|  | Year ended December 31, |
|  | 2021 |  |  | 2020 |  |  | 2019 |
Net income (loss) |  | $ | 377,661 |  |  | $ | (348,865 | ) |  | $ | 66,858 |
Basic weighted-average common shares outstanding |  |  | 75,948,686 |  |  |  | 65,949,672 |  |  |  | 54,392,304 |
Effect of potentially dilutive securities: |  |  |  |  |  |  |  |  |
Outstanding options |  |  | 3,990,579 |  |  |  | — |  |  |  | 2,406,962 |
Unvested restricted common shares |  |  | 454,231 |  |  |  | — |  |  |  | 133,532 |
Diluted weighted-average common shares outstanding |  |  | 80,393,496 |  |  |  | 65,949,672 |  |  |  | 56,932,798 |
Net income (loss) per common share — basic |  | $ | 4.97 |  |  | $ | (5.29 | ) |  | $ | 1.23 |
Net income (loss) per common share — diluted |  | $ | 4.70 |  |  | $ | (5.29 | ) |  | $ | 1.17 |
The Company did not include the securities in the following table in the computation of the net income (loss) per share calculations because the effect would have been anti-dilutive during each period:
|  | Year ended December 31, |
|  | 2021 |  |  | 2020 |  |  | 2019 |
Outstanding options |  |  | 1,765,881 |  |  |  | 8,101,980 |  |  |  | 3,789,129 |
Unvested restricted common shares |  |  | 225,904 |  |  |  | 894,092 |  |  |  | 108,625 |
ESPP |  |  | 6,671 |  |  |  | 11,257 |  |  |  | — |
Total |  |  | 1,998,456 |  |  |  | 9,007,329 |  |  |  | 3,897,754 |

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