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Equity-Based Compensation | 3 Months Ended
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Mar. 31, 2023
Share-Based Payment Arrangement [Abstract] |
Equity-Based Compensation | 11. Equity-Based Compensation In connection with the closing of the Company’s initial public offering, the Board of Directors and stockholders approved the 2018 Omnibus Incentive Plan (the “2018 Plan”), which provides for the reservation of 333,400 shares of common stock for equity awards. On June 16, 2020, the Company’s stockholders approved the 2020 Equity Incentive Plan (as amended or restated, the “2020 Plan”) which consisted of, at the time of approval (i) 200,000 shares of common stock and (ii) additional shares of common stock (up to 325,268) as is equal to (i) the number of shares reserved under the 2018 Plan that remain available for grant under the 2018 Plan as of immediately prior to the date the 2020 Plan was approved by the Company’s stockholders and (ii) the number of shares subject to awards granted under the 2018 Plan which awards expire, terminate or are otherwise surrendered, cancelled, forfeited or repurchased by the Company at their original issuance price pursuant to a contractual repurchase right. As of the effective date of the 2020 Plan, no further awards will be made under the 2018 Plan. Any options or awards outstanding under the 2018 Plan remain outstanding and effective and are governed by their existing terms. In June 2021, the Company’s stockholders approved an amendment to the 2020 Plan to reserve an additional 466,666 shares of common stock for issuance under the plan. On December 1, 2022, the Company's stockholders approved an amendment and restatement of the 2020 Plan to (i) increase the number of shares of common stock reserved for issuance under the plan by 866,666 shares to 1,533,333 shares, subject to adjustment in the event of stock splits and other similar events, (ii) provide for an annual increase, to be added on the first day of each fiscal year during the term of the plan, beginning with the fiscal year ending December 31, 2023, of 5% of the number of shares of common stock outstanding on the first day of such fiscal year or a lesser number of shares determined by the Board of Directors, (iii) provide that up to 1,858,601 shares of common stock may be granted as “incentive stock options” under the 2020 Plan, (iv) extend the term of the plan to December 1, 2032 and (v) revise certain provisions of the plan relating to the Board of Director’s ability to delegate authorit y to make awards under the plan. Under the 2020 Plan, stock options may not be granted at less than fair value on the date of grant. As of March 31, 2023, 137,662 shares remained available for future issuance under the 2020 Plan. Under the 2020 Plan, stock options may not be granted at less than fair value on the date of grant. In June 2021, the Company's stockholders also approved the 2021 Employee Stock Purchase Plan (“ESPP”), which provides for 73,525 shares to be available for purchase by eligible employees according to its terms. The first offering period under the ESPP commenced on September 1, 2021. As of March 31, 2023, 41,417 shares remained available for future issuance under the ESPP. During the three months ended March 31, 2023, the Company granted options to purchase 695,596 shares of common stock under the 2020 Plan and options to purchase 90,000 shares of common stock as an inducement award in accordance with Nasdaq Listing Rule 5635(c)(4). During the three months ended March 31, 2022, the Company granted options to purchase 174,738 shares of common stock. During the three months ended March 31, 2023, the Company granted 347,997 restricted stock units under the 2020 Plan and 45,000 restricted stock units as an inducement award in accordance with Nasdaq Listing Rule 5635(c)(4). During the three months ended March 31, 2022, the Company granted 96,766 restricted stock units. The Company recorded equity-based compensation expense related to all of its share-based awards to employees and non-employees in the following captions within its condensed consolidated statements of operations:
|  | Three Months Ended March 31, |
|  | 2023 |  |  | 2022 |
Research and development |  | $ | 898 |  |  | $ | 1,180 |
General and administrative |  |  | 1,220 |  |  |  | 1,432 |
Total |  | $ | 2,118 |  |  | $ | 2,612 |

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