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Stock Option and Grant Plan | 9 Months Ended
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Sep. 30, 2022
Share-Based Payment Arrangement [Abstract] |
Stock Option and Grant Plan | 10. Stock Option and Grant Plan Stock Incentive Plan In January 2022, the Company’s board of directors adopted, and its stockholders approved the 2022 Stock Option and Incentive Plan, or 2022 Plan, which became effective on January 5, 2022, at which point no further grants would be made under the 2015 Stock Option and Restricted Stock Plan, or 2015 Plan. Under the 2022 Plan, the Company may grant incentive stock options, or ISOs, non-statutory stock options, stock appreciation rights, restricted stock units, restricted stock awards and other stock-based awards. As of September 30, 2022, there were 3,056,609 shares available for future issuance under the 2022 Plan. The options issued under the 2022 Plan expire after 10 years. Initially, subject to adjustment as provided in the 2022 Plan, the aggregate number of shares of the Company’s common stock available for issuance under the 2022 Plan is 7,650,000. The number of shares of the Company’s common stock reserved for issuance under the 2022 Plan will automatically increase on January 1 of each year commencing January 1, 2023, by 5% of the total number of shares of the Company’s common stock outstanding on December 31 of the preceding calendar year, or a lesser number of shares as may be determined by the Company’s board of directors. The maximum current number of shares that may be issued pursuant to the exercise of ISOs under the 2022 Plan is 7,650,000. The maximum number of shares of the Company’s common stock subject to awards granted under the 2022 Plan or otherwise during a single calendar year to any individual nonemployee director, taken together with any cash fees paid by the Company to such nonemployee director during the calendar year for serving on the Company’s board of directors, will not exceed $750,000 in total value, or, with respect to the calendar year in which a nonemployee director is first appointed or elected to the Company’s board of directors, $1,000,000. All options and awards granted under the 2015 Plan consisted of the Company’s common stock. As of January 6, 2022, no additional stock awards have been or will be granted under the 2015 Plan. Although the 2015 Plan was terminated as to future awards in January 2022, it continues to govern the terms of options that remain outstanding under the 2015 Plan. General Option Information A summary of option activity for the nine months ended September 30, 2022, is as follows:
|  | Number of Options |  |  | Weighted- Average Exercise Price |  |  | Weighted- Average Remaining Contractual Term (in years) |  |  | Aggregate Intrinsic Value (in thousands) |
Outstanding at December 31, 2021 |  |  | 5,339,011 |  |  | $ | 5.54 |  |  |  | 8.7 |  |  | $ | 15,627 |
Granted |  |  | 3,968,720 |  |  | $ | 19.22 |  |  |  |  |  |  |
Exercised |  |  | (669,040 | ) |  | $ | 0.37 |  |  |  |  |  | $ | 5,961 |
Cancelled or forfeited |  |  | (63,242 | ) |  | $ | 13.28 |  |  |  |  |  |  |
Outstanding at September 30, 2022 |  |  | 8,575,449 |  |  | $ | 12.22 |  |  |  | 8.4 |  |  | $ | 137,204 |
Options exercisable as of September 30, 2022 |  |  | 1,792,734 |  |  | $ | 5.13 |  |  |  | 7.0 |  |  | $ | 41,265 |
Options unvested as of September 30, 2022 |  |  | 6,782,715 |  |  | $ | 14.10 |  |  |  | 8.8 |  |  | $ | 95,939 |
Weighted average grant-date fair value of options granted during the period |  | $ | 14.32 |  |  |  |  |  |  |  |  |  |
The aggregate intrinsic value of stock options is calculated as the difference between the exercise price of the options and the fair value of the Company’s common stock for those options that had exercise prices lower than the fair value of the Company’s common stock. The aggregate intrinsic value of options exercised during the nine months ended September 30, 2022 and 2021 was $6.0 million and $4.5 million, respectively. The total fair value of stock options vested during the nine months ended September 30, 2022 and 2021 was $5.1 million and $0.7 million, respectively. Restricted Stock Unit Activity A summary of restricted stock unit activity for the nine months ended September 30, 2022, is as follows:
|  | Number of shares |  |  | Weighted Average Grant Date Fair Value |
Nonvested as of December 31, 2021 |  |  | — |  |  | $ | — |
Granted |  |  | 693,613 |  |  | $ | 18.62 |
Vested |  |  | — |  |  | $ | — |
Forfeited |  |  | (5,700 | ) |  | $ | 21.59 |
Nonvested as of September 30, 2022 |  |  | 687,913 |  |  | $ | 18.60 |
Summary of Stock-Based Compensation Expense Stock-based compensation expense recorded in the condensed consolidated statements of comprehensive income for the three and nine months ended September 30, 2022 and 2021, is as follows:
|  | Three Months Ended September 30, |  |  | Nine Months Ended September 30, |
|  | 2022 |  |  | 2021 |  |  | 2022 |  |  | 2021 |
|  | (in thousands) |  |  | (in thousands) |
Research and development |  | $ | 1,416 |  |  | $ | 187 |  |  | $ | 4,001 |  |  | $ | 578 |
Selling, general and administrative |  |  | 4,108 |  |  |  | 615 |  |  |  | 11,622 |  |  |  | 1,467 |
Total stock-based compensation expense |  | $ | 5,524 |  |  | $ | 802 |  |  | $ | 15,623 |  |  | $ | 2,045 |
The following table summarizes stock-based compensation by type of award:
|  | Three Months Ended September 30, |  |  | Nine Months Ended September 30, |
|  | 2022 |  |  | 2021 |  |  | 2022 |  |  | 2021 |
|  | (in thousands) |  |  | (in thousands) |
Stock options |  | $ | 4,748 |  |  | $ | 802 |  |  | $ | 13,611 |  |  | $ | 2,045 |
Restricted stock units |  |  | 776 |  |  |  | — |  |  |  | 2,012 |  |  |  | — |
Total stock-based compensation expense |  | $ | 5,524 |  |  | $ | 802 |  |  | $ | 15,623 |  |  | $ | 2,045 |
The following table summarizes unrecognized stock-based compensation expense as of September 30, 2022, by type of awards, and the weighted-average period over which that expense is expected to be recognized. The total unrecognized stock-based compensation expense will be adjusted for actual forfeitures as they occur.
|  | As of September 30, 2022 |
|  | Unrecognized Expense |  |  | Weighted-average Recognition Period |
|  | (in thousands) |  |  | (in years) |
Stock options |  | $ | 59,563 |  |  |  | 3.13 |
Restricted stock units |  | $ | 10,781 |  |  |  | 3.38 |

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