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Equity Incentive Plans - Summary of Restricted Stock Unit Activity (Details) - $ / shares
9 Months Ended
Sep. 30, 2023
Sep. 30, 2022
Weighted-Average Grant Date Fair Value per Share    
Weighted-Average Grant Date Fair Value per Share, Nonvested Outstanding, Granted $ 5.61 $ 7.36
Restricted Stock Units (RSUs) | 2019 Equity Incentive Plan    
Restricted Stock Units Outstanding    
Restricted Stock Units Outstanding, Nonvested Outstanding, Beginning Balance 5,981,755  
Restricted Stock Units Outstanding, Granted 6,837,818  
Restricted Stock Units Outstanding, Forfeited (1,580,775)  
Restricted Stock Units Outstanding, Vested (1,300,344)  
Restricted Stock Units Outstanding, Nonvested Outstanding, Ending Balance 9,938,454  
Weighted-Average Grant Date Fair Value per Share    
Weighted-Average Grant Date Fair Value per Share, Nonvested Outstanding, Beginning Balance $ 14.11  
Weighted-Average Grant Date Fair Value per Share, Nonvested Outstanding, Granted 8.36 $ 11.72
Weighted-Average Grant Date Fair Value per Share, Nonvested Outstanding, Forfeited 11.37  
Weighted-Average Grant Date Fair Value per Share, Nonvested Outstanding, Vested 14.8  
Weighted-Average Grant Date Fair Value per Share, Nonvested Outstanding, Ending Balance $ 10.49