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Condensed Consolidated Statement of Changes in Redeemable Noncontrolling Interest and Stockholders' Deficit - Unaudited - USD ($) $ in Thousands | Total | Class A Common Stock | Class B Common Stock | Redeemable Noncontrolling Interest Redeemable Noncontrolling Interest | Common Stock Class A Common Stock | Common Stock Class B Common Stock | Note Receivable for Common Stock | Note Receivable for Common Stock Class A Common Stock | Additional Paid-in Capital | Additional Paid-in Capital Class A Common Stock | Accumulated Deficit
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Beginning balance at Dec. 31, 2021 |  |  |  | $ 24,962 |  |  |  |  |  |  |
Stockholders' Equity Attributable to Noncontrolling Interest [Roll Forward] |  |  |  |  |  |  |  |  |  |  |
Net loss |  |  |  | (4,564) |  |  |  |  |  |  |
Change in redemption value of noncontrolling interest |  |  |  | 3,809 |  |  |  |  |  |  |
Ending balance at Sep. 30, 2022 |  |  |  | 24,207 |  |  |  |  |  |  |
Beginning balance, shares (in shares) at Dec. 31, 2021 |  |  |  |  | 66,942,777 | 23,093,860 |  |  |  |  |
Beginning balance at Dec. 31, 2021 | $ (9,740) |  |  |  | $ 669 | $ 232 | $ 0 |  | $ 238,193 |  | $ (248,834)
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |
Net loss | (14,419) |  |  |  |  |  |  |  |  |  | (14,419)
Share-based compensation | 981 |  |  |  |  |  |  |  | 981 |  |
Issuance of Class A Common Stock to Collaboration Partner (in shares) |  |  |  |  | 10,386,274 |  |  |  |  |  |
Issuance of Class A common stock to collaboration partner, net of offering cost | 5,040 |  |  |  | $ 104 |  |  |  |  | $ 4,936 |
Issuance of Class A common stock under CinRx purchase agreement, net of offering costs (in shares) |  |  |  |  | 4,154,549 |  |  |  |  |  |
Issuance of Class A common stock under CinRx purchase agreement, net of offering costs | 5,378 |  |  |  | $ 42 |  |  | $ (4,000) |  | 9,336 |
Change in redemption value of noncontrolling interest | (3,809) |  |  |  |  |  |  |  |  |  | (3,809)
Ending balance, shares (in shares) at Sep. 30, 2022 |  |  |  |  | 81,483,600 | 23,093,860 |  |  |  |  |
Ending balance at Sep. 30, 2022 | (16,569) |  |  |  | $ 815 | $ 232 | (4,000) |  | 253,446 |  | (267,062)
Beginning balance at Jun. 30, 2022 |  |  |  | 15,916 |  |  |  |  |  |  |
Stockholders' Equity Attributable to Noncontrolling Interest [Roll Forward] |  |  |  |  |  |  |  |  |  |  |
Net loss |  |  |  | (1,207) |  |  |  |  |  |  |
Change in redemption value of noncontrolling interest |  |  |  | 9,498 |  |  |  |  |  |  |
Ending balance at Sep. 30, 2022 |  |  |  | 24,207 |  |  |  |  |  |  |
Beginning balance, shares (in shares) at Jun. 30, 2022 |  |  |  |  | 77,329,051 | 23,093,860 |  |  |  |  |
Beginning balance at Jun. 30, 2022 | (8,526) |  |  |  | $ 773 | $ 232 | 0 |  | 243,772 |  | (253,303)
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |
Net loss | (4,261) |  |  |  |  |  |  |  |  |  | (4,261)
Share-based compensation | 338 |  |  |  |  |  |  |  | 338 |  |
Issuance of Class A common stock under CinRx purchase agreement, net of offering costs (in shares) |  |  |  |  | 4,154,549 |  |  |  |  |  |
Issuance of Class A common stock under CinRx purchase agreement, net of offering costs | 5,378 |  |  |  | $ 42 |  |  | $ (4,000) |  | $ 9,336 |
Change in redemption value of noncontrolling interest | (9,498) |  |  |  |  |  |  |  |  |  | (9,498)
Ending balance, shares (in shares) at Sep. 30, 2022 |  |  |  |  | 81,483,600 | 23,093,860 |  |  |  |  |
Ending balance at Sep. 30, 2022 | (16,569) |  |  |  | $ 815 | $ 232 | $ (4,000) |  | 253,446 |  | (267,062)
Beginning balance at Dec. 31, 2022 | 16,579 |  |  | 16,579 |  |  |  |  |  |  |
Stockholders' Equity Attributable to Noncontrolling Interest [Roll Forward] |  |  |  |  |  |  |  |  |  |  |
Net loss |  |  |  | (4,753) |  |  |  |  |  |  |
Change in redemption value of noncontrolling interest |  |  |  | (1,104) |  |  |  |  |  |  |
Ending balance at Sep. 30, 2023 | 10,722 |  |  | 10,722 |  |  |  |  |  |  |
Beginning balance, shares (in shares) at Dec. 31, 2022 |  | 81,483,600 | 23,093,860 |  | 81,483,600 | 23,093,860 |  |  |  |  |
Beginning balance at Dec. 31, 2022 | (10,740) |  |  |  | $ 815 | $ 232 |  |  | 253,737 |  | (265,524)
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |
Net loss | (16,772) |  |  |  |  |  |  |  |  |  | (16,772)
Share-based compensation | 1,175 |  |  |  |  |  |  |  | 1,175 |  |
Change in redemption value of noncontrolling interest | 1,104 |  |  |  |  |  |  |  |  |  | 1,104
Ending balance, shares (in shares) at Sep. 30, 2023 |  | 81,483,600 | 23,093,860 |  | 81,483,600 | 23,093,860 |  |  |  |  |
Ending balance at Sep. 30, 2023 | (25,233) |  |  |  | $ 815 | $ 232 |  |  | 254,912 |  | (281,192)
Beginning balance at Jun. 30, 2023 |  |  |  | 18,879 |  |  |  |  |  |  |
Stockholders' Equity Attributable to Noncontrolling Interest [Roll Forward] |  |  |  |  |  |  |  |  |  |  |
Net loss |  |  |  | (1,886) |  |  |  |  |  |  |
Change in redemption value of noncontrolling interest |  |  |  | (6,271) |  |  |  |  |  |  |
Ending balance at Sep. 30, 2023 | 10,722 |  |  | $ 10,722 |  |  |  |  |  |  |
Beginning balance, shares (in shares) at Jun. 30, 2023 |  |  |  |  | 81,483,600 | 23,093,860 |  |  |  |  |
Beginning balance at Jun. 30, 2023 | (25,283) |  |  |  | $ 815 | $ 232 |  |  | 254,479 |  | (280,809)
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |
Net loss | (6,654) |  |  |  |  |  |  |  |  |  | (6,654)
Share-based compensation | 433 |  |  |  |  |  |  |  | 433 |  |
Change in redemption value of noncontrolling interest | 6,271 |  |  |  |  |  |  |  |  |  | 6,271
Ending balance, shares (in shares) at Sep. 30, 2023 |  | 81,483,600 | 23,093,860 |  | 81,483,600 | 23,093,860 |  |  |  |  |
Ending balance at Sep. 30, 2023 | $ (25,233) |  |  |  | $ 815 | $ 232 |  |  | $ 254,912 |  | $ (281,192)

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