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Stock-Based Compensation - Schedule of Common Stock Option Activity (Detail) - USD ($)
$ / shares in Units, $ in Thousands
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Number of Shares, Beginning Balance 6,248,675  
Number of Shares, Granted 4,509,673  
Number of Shares, Exercised 0  
Number of Shares, Forfeited (2,282,532)  
Number of Shares, Ending Balance 8,475,816 6,248,675
Number of Shares, Options vested and expected to vest as of December 31, 2022 8,475,816  
Number of Shares, Options exercisable as of December 31, 2020 3,641,107  
Weighted-Average Exercise Price, Outstanding, Beginning balance $ 9.15  
Weighted-Average Exercise Price, Granted 2.13  
Weighted-Average Exercise Price, Exercised 0  
Weighted-Average Exercise Price, Forfeited 7.31  
Weighted-Average Exercise Price, Outstanding, Ending balance 5.91 $ 9.15
Weighted-Average Exercise Price, Options vested and expected to vest as of December 31, 2022 5.91  
Weighted-Average Exercise Price, Options exercisable as of December 31, 2022 $ 8.27  
Weighted Average Remaining Contractual Term 8 years 2 months 12 days 8 years 2 months 12 days
Weighted Average Remaining Contractual Term, Options vested and expected to vest as of December 31, 2022 8 years 2 months 12 days  
Weighted Average Remaining Contractual Term, Options exercisable as of December 31, 2022 7 years 1 month 6 days  
Aggregate Intrinsic Value, Beginning Balance $ 0