Stockholders' Equity - Schedule of Common Stock, Reserved for Future Issuance (Detail) - shares	Sep. 30, 2024		Dec. 31, 2023
Class of Stock [Line Items]
Total common stock reserved	19,086,286		27,588,546
Options Issued and Outstanding
Class of Stock [Line Items]
Total common stock reserved	18,545,620	[1]	18,280,548
Preferred Stock Warrants Issued and Outstanding
Class of Stock [Line Items]
Total common stock reserved	540,666		540,666
Convertible Preferred Stock Issued and Outstanding
Class of Stock [Line Items]
Total common stock reserved			8,767,332

[1] Includes 7,701,462 options exercisable for shares of common stock, which underlying shares of common stock were transferred in the name of the Company to Futu Network Technology Limited, the stock plan administrator of the 2023 Omnibus Incentive Sub-Plan for Chinese Participants.