Net Loss per Share - Schedule of Potentially Dilutive Securities not Included in Calculation of Diluted Net Loss per Share (Detail) - shares	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive securities not included in calculation of dilutive net loss per share (in shares)	35,403,802	30,830,705
Class B Common Stock
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive securities not included in calculation of dilutive net loss per share (in shares)	23,093,860	23,093,860
Common stock options granted under the Plan
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive securities not included in calculation of dilutive net loss per share (in shares)	9,095,439	5,722,342
Common stock warrants
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive securities not included in calculation of dilutive net loss per share (in shares)	3,214,503	2,014,503