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Equity Incentive Plans - Summary of Restricted Stock Unit Activity (Details) - $ / shares
9 Months Ended
Sep. 30, 2022
Sep. 30, 2021
Weighted-Average Grant Date Fair Value per Share    
Weighted-Average Grant Date Fair Value per Share, Nonvested Outstanding, Granted $ 7.36 $ 25.25
Restricted Stock Units (RSUs) | 2019 Equity Incentive Plan    
Restricted Stock Units Outstanding    
Restricted Stock Units Outstanding, Nonvested Outstanding, Beginning Balance 1,211,191  
Restricted Stock Units Outstanding, Granted 5,905,359  
Restricted Stock Units Outstanding, Forfeited or cancelled (1,418,796)  
Restricted Stock Units Outstanding, Vested (231,371)  
Restricted Stock Units Outstanding, Nonvested Outstanding, Ending Balance 5,466,383  
Weighted-Average Grant Date Fair Value per Share    
Weighted-Average Grant Date Fair Value per Share, Nonvested Outstanding, Beginning Balance $ 37.41  
Weighted-Average Grant Date Fair Value per Share, Nonvested Outstanding, Granted 11.72 $ 40.21
Weighted-Average Grant Date Fair Value per Share, Nonvested Outstanding, Forfeited or cancelled 16.44  
Weighted-Average Grant Date Fair Value per Share, Nonvested Outstanding, Vested 39.40  
Weighted-Average Grant Date Fair Value per Share, Nonvested Outstanding, Ending Balance $ 15.01