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Capital Structure | 12 Months Ended
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Dec. 31, 2024
Stockholders' Equity Note [Abstract] |
Capital Structure | 10. Capital Structure Common Stock The Company has two authorized classes of common stock, Class A and Class B. The rights of the holders of Class A and Class B common stock are identical, except with respect to voting and conversion. Each share of Class A common stock is entitled to one vote and shares of Class B common stock are non-voting. Each share of Class B common stock may be converted at any time to one share of Class A common stock at the option of its holder, subject to the ownership limitations provided for in the Company’s amended and restated certificate of incorporation. In August 2024, the Company entered into the 2024 Sales Agreement with respect to an at-the-market offering program with TD Cowen, which allows the Company to issue and sell shares of Class A common stock pursuant to the 2024 Form S-3 for total gross sales proceeds of up to $50.0 million from time to time through TD Cowen, acting as its agent. As of December 31, 2024, the Company has no t sold any shares of Class A common stock under the 2024 Sales Agreement. The following shares of Class A common stock were reserved for future issuance:
|  | December 31, |
|  | 2024 |  |  | 2023 |
Warrants to purchase Class A common stock |  |  | 2,646,247 |  |  |  | 2,775,978 |
Options to purchase Class A common stock |  |  | 6,113,155 |  |  |  | 7,251,663 |
Restricted stock units outstanding |  |  | 1,631,162 |  |  |  | 2,692,459 |
Class A common stock available for future grants under the 2021 Equity Incentive Plan |  |  | 2,071,498 |  |  |  | 1,002,091 |
Class A common stock available for future grants under the 2021 Employee Stock Purchase Plan |  |  | 1,060,293 |  |  |  | 801,668 |
Total |  |  | 13,522,355 |  |  |  | 14,523,859 |
Preferred Stock The Company is authorized to issue up to 5,000,000 shares of preferred stock, par value $0.0001 per share. There were no preferred shares outstanding at December 31, 2024 and 2023.

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