Shareholders' Equity - Summary of Reserved Shares of Common Stock (Details)	Dec. 31, 2021 shares
Class Of Stock [Line Items]
Total shares of common stock reserved for future issuance	39,094,396
Exercise of Outstanding Common Stock Options and Vesting of Outstanding Common Restricted Stock Units Granted
Class Of Stock [Line Items]
Total shares of common stock reserved for future issuance	13,990,175
Grant | 2019 Equity Incentive Plan
Class Of Stock [Line Items]
Total shares of common stock reserved for future issuance	22,299,923
Grant | Employee Stock Purchase Plan
Class Of Stock [Line Items]
Total shares of common stock reserved for future issuance	2,804,298