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Nature of Business and Basis of Presentation - Additional Information (Details)
Sep. 30, 2021
USD ($)
Product
Dec. 31, 2020
USD ($)
Organization Consolidation And Presentation Of Financial Statements [Abstract]    
Number of late-stage candidates in Company's product candidate portfolio | Product 5  
Accumulated deficit | $ $ 375,222,949 $ 278,796,093