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Organization and Description of Business - Additional Information (Detail) - USD ($)
$ in Thousands
Aug. 27, 2021
Aug. 09, 2021
Sep. 21, 2020
Dec. 31, 2023
Dec. 31, 2022
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]          
Proceeds from private placement     $ 100,000    
Accumulated deficit       $ 1,757,778 $ 1,082,028
Initial Public Offering [Member]          
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]          
Proceeds from issuance of common stock     $ 822,267    
Conversa Health Inc. [Member]          
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]          
Effective date of acquisition   Aug. 09, 2021      
Silver Cloud Health Holdings, Inc. [Member]          
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]          
Effective date of acquisition Aug. 27, 2021