Convertible Preferred Stock	6 Months Ended
Jun. 30, 2022
Temporary Equity Disclosure [Abstract]
Convertible Preferred Stock	6. Convertible Preferred Stock Series B Convertible Preferred Stock On March 5, 2021, the Company entered into a securities purchase agreement (as amended, “Series B Agreement”) with certain investors to sell shares of Series B convertible preferred stock (“Series B”) at $1.6458 per share. In March 2021, the Company issued 92,356,299 shares of Series B to institutional investors at $1.6458 per share for gross cash proceeds of $152.0 million, less issuance costs of $0.4 million, resulting in net proceeds of $151.6 million. In addition, the Company granted 12,455,949 shares, or $20.5 million, of Series B convertible preferred stock through separate agreements with Pfizer, Inc. and LegoChem Biosciences Inc. The Company effected a 1-for-6.359 reverse stock split in October 2021. Upon the initial public offering, 104,812,248 shares of Series B were converted to 16,482,486 shares of common stock.

Convertible Preferred Stock

6 Months Ended

Jun. 30, 2022

Temporary Equity Disclosure [Abstract]

6. Convertible Preferred Stock

Series B Convertible Preferred Stock

On March 5, 2021, the Company entered into a securities purchase agreement (as amended, “Series B Agreement”) with certain investors to sell shares of Series B convertible preferred stock (“Series B”) at $1.6458 per share. In March 2021, the Company issued 92,356,299 shares of Series B to institutional investors at $1.6458 per share for gross cash proceeds of $152.0 million, less issuance costs of $0.4 million, resulting in net proceeds of $151.6 million. In addition, the Company granted 12,455,949 shares, or $20.5 million, of Series B convertible preferred stock through separate agreements with Pfizer, Inc. and LegoChem Biosciences Inc. The Company effected a 1-for-6.359 reverse stock split in October 2021. Upon the initial public offering, 104,812,248 shares of Series B were converted to 16,482,486 shares of common stock.