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CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS’ EQUITY - USD ($) $ in Thousands | Total | 2023 Employee Bonus Plan | 2022 Employee Bonus Plan | Common Stock | Common Stock 2023 Employee Bonus Plan | Common Stock 2022 Employee Bonus Plan | Additional Paid-in Capital | Additional Paid-in Capital 2023 Employee Bonus Plan | Additional Paid-in Capital 2022 Employee Bonus Plan | Accumulated Deficit
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Beginning balance (in shares) at Dec. 31, 2022 |  |  |  |  | 33,393,737 |  |  |  |  |  |  |
Beginning balance at Dec. 31, 2022 |  | $ 68,748 |  |  | $ 4 |  |  |  | $ 156,485 |  |  | $ (87,741)
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |
Net loss |  | (31,450) |  |  |  |  |  |  |  |  |  | (31,450)
Issuance of Class A common stock upon exercise of stock options (in shares) |  |  |  |  | 1,184,765 |  |  |  |  |  |  |
Issuance of Class A common stock upon exercise of stock options |  | 2,055 |  |  |  |  |  |  | 2,055 |  |  |
Issuance of Class A common stock under the 2021 Plan (in shares) |  |  |  |  | 769,536 |  |  |  |  |  |  |
Issuance of Class A common stock related to the Employee Stock Purchase Plan ("ESPP") (in shares) |  |  |  |  | 348,555 |  |  |  |  |  |  |
Issuance of Class A common stock related to the 2021 Employee Stock Purchase Plan ("ESPP") |  | 1,171 |  |  |  |  |  |  | 1,171 |  |  |
Issuance of restricted stock units related to the Bonus Plan (see Note 14) (in shares) |  |  |  |  |  |  |  | 287,908 |  |  |  |
Issuance of restricted stock units related to the Bonus Plan (see Note 14) |  |  |  | $ 1,848 |  |  |  |  |  |  | $ 1,848 |
Stock-based compensation |  | 11,813 |  |  |  |  |  |  | 11,813 |  |  |
Ending balance (in shares) at Jun. 30, 2023 |  |  |  |  | 35,984,501 |  |  |  |  |  |  |
Ending balance at Jun. 30, 2023 |  | 54,185 |  |  | $ 4 |  |  |  | 173,372 |  |  | (119,191)
Beginning balance (in shares) at Mar. 31, 2023 |  |  |  |  | 34,517,414 |  |  |  |  |  |  |
Beginning balance at Mar. 31, 2023 |  | 60,569 |  |  | $ 4 |  |  |  | 165,419 |  |  | (104,854)
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |
Net loss |  | (14,337) |  |  |  |  |  |  |  |  |  | (14,337)
Issuance of Class A common stock upon exercise of stock options (in shares) |  |  |  |  | 687,860 |  |  |  |  |  |  |
Issuance of Class A common stock upon exercise of stock options |  | 1,215 |  |  |  |  |  |  | 1,215 |  |  |
Issuance of Class A common stock under the 2021 Plan (in shares) |  |  |  |  | 430,672 |  |  |  |  |  |  |
Issuance of Class A common stock related to the Employee Stock Purchase Plan ("ESPP") (in shares) |  |  |  |  | 348,555 |  |  |  |  |  |  |
Issuance of Class A common stock related to the 2021 Employee Stock Purchase Plan ("ESPP") |  | 1,171 |  |  |  |  |  |  | 1,171 |  |  |
Stock-based compensation |  | 5,567 |  |  |  |  |  |  | 5,567 |  |  |
Ending balance (in shares) at Jun. 30, 2023 |  |  |  |  | 35,984,501 |  |  |  |  |  |  |
Ending balance at Jun. 30, 2023 |  | 54,185 |  |  | $ 4 |  |  |  | 173,372 |  |  | (119,191)
Beginning balance (in shares) at Dec. 31, 2023 | [1] |  |  |  | 39,150,610 |  |  |  |  |  |  |
Beginning balance at Dec. 31, 2023 |  | 44,938 |  |  | $ 4 | [1] |  |  | 192,388 |  |  | (147,454)
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |
Net loss |  | $ (21,401) |  |  |  |  |  |  |  |  |  | (21,401)
Issuance of Class A common stock upon exercise of stock options (in shares) |  | 1,694,829 |  |  | 1,694,829 | [1] |  |  |  |  |  |
Issuance of Class A common stock upon exercise of stock options |  | $ 4,999 |  |  |  |  |  |  | 4,999 |  |  |
Issuance of Class A common stock under the 2021 Plan (in shares) | [1] |  |  |  | 1,357,877 |  |  |  |  |  |  |
Issuance of Class A common stock related to the Employee Stock Purchase Plan ("ESPP") (in shares) | [1] |  |  |  | 386,517 |  |  |  |  |  |  |
Issuance of Class A common stock related to the 2021 Employee Stock Purchase Plan ("ESPP") |  | 1,359 |  |  |  |  |  |  | 1,359 |  |  |
Issuance of restricted stock units related to the Bonus Plan (see Note 14) (in shares) | [1] |  |  |  |  |  | 296,448 |  |  |  |  |
Issuance of restricted stock units related to the Bonus Plan (see Note 14) |  |  | $ 3,507 |  |  |  |  |  |  | $ 3,507 |  |
Stock-based compensation |  | 11,696 |  |  |  |  |  |  | 11,696 |  |  |
Ending balance (in shares) at Jun. 30, 2024 | [1] |  |  |  | 42,886,281 |  |  |  |  |  |  |
Ending balance at Jun. 30, 2024 |  | 45,098 |  |  | $ 4 | [1] |  |  | 213,949 |  |  | (168,855)
Beginning balance (in shares) at Mar. 31, 2024 | [1] |  |  |  | 41,469,779 |  |  |  |  |  |  |
Beginning balance at Mar. 31, 2024 |  | 47,454 |  |  | $ 4 | [1] |  |  | 205,957 |  |  | (158,507)
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |
Net loss |  | (10,348) |  |  |  |  |  |  |  |  |  | (10,348)
Issuance of Class A common stock upon exercise of stock options (in shares) | [1] |  |  |  | 265,347 |  |  |  |  |  |  |
Issuance of Class A common stock upon exercise of stock options |  | 716 |  |  |  |  |  |  | 716 |  |  |
Issuance of Class A common stock under the 2021 Plan (in shares) | [1] |  |  |  | 764,638 |  |  |  |  |  |  |
Issuance of Class A common stock related to the Employee Stock Purchase Plan ("ESPP") (in shares) | [1] |  |  |  | 386,517 |  |  |  |  |  |  |
Issuance of Class A common stock related to the 2021 Employee Stock Purchase Plan ("ESPP") |  | 1,359 |  |  |  |  |  |  | 1,359 |  |  |
Stock-based compensation |  | 5,917 |  |  |  |  |  |  | 5,917 |  |  |
Ending balance (in shares) at Jun. 30, 2024 | [1] |  |  |  | 42,886,281 |  |  |  |  |  |  |
Ending balance at Jun. 30, 2024 |  | $ 45,098 |  |  | $ 4 | [1] |  |  | $ 213,949 |  |  | $ (168,855)
[1] | (1) On July 6, 2023, all shares of the Company’s then outstanding Class B common stock were automatically converted into the same number of Class A common stock, pursuant to the terms of the Company’s Amended and Restated Certificate of Incorporation. No additional shares of Class B common stock will be issued following such conversion. See Note 15 for further details.

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