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Stock-based Compensation - Summary of Options to Purchase Common Stock (Details) - 2019 Equity Incentive Plan
$ / shares in Units, $ in Thousands
3 Months Ended
Mar. 31, 2022
USD ($)
$ / shares
shares
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]  
Number of Options, Outstanding, beginning balance | shares 11,644,070
Number of Options, Granted | shares 1,575,780
Number of Options, Exercised | shares (234,117)
Number of Options, Forfeited | shares (460,926)
Number of Options, Outstanding, ending balance | shares 12,524,807
Number of Options, Exercisable | shares 5,152,851
Number of Options, Vested and expected to vest | shares 12,524,807
Weighted average exercise price, Outstanding, beginning balance | $ / shares $ 16.41
Weighted average exercise price, Granted | $ / shares 17.27
Weighted average exercise price, Exercised | $ / shares 10.61
Weighted average exercise price, Forfeited | $ / shares 18.38
Weighted average exercise price, Outstanding, ending balance | $ / shares 16.55
Weighted average exercise price, Exercisable | $ / shares 14.95
Weighted average exercise price, Vested and expected to vest | $ / shares $ 16.55
Weighted Average Remaining Contractual Term, Outstanding (in years) 8 years 3 months 18 days
Weighted Average Remaining Contractual Term, Exercisable (In years) 7 years 6 months
Weighted Average Remaining Contractual Term, Vested and expected to vest (In years) 8 years 3 months 18 days
Aggregate Intrinsic Value, Outstanding | $ $ 19,371
Aggregate Intrinsic Value, Exercisable | $ 12,167
Aggregate Intrinsic Value, Vested or expected to vest | $ $ 19,371