Stockholders' Equity (Deficit) and Equity Incentive Plans - Schedule of Reserved Shares of Common Stock (Details) - shares shares in Thousands	Mar. 31, 2022	Dec. 31, 2021
Class Of Stock [Line Items]
Total reserved shares	49,559,456	44,599,148
Employee Stock Option | Option and Grant Plan
Class Of Stock [Line Items]
Total reserved shares	23,630,605	19,005,008
Equity Plan Stock Options Outstanding
Class Of Stock [Line Items]
Total reserved shares	18,076,050	21,214,155
RSUs Outstanding
Class Of Stock [Line Items]
Total reserved shares	4,090,669	1,716,614
2021 Employee Stock Purchase Plan
Class Of Stock [Line Items]
Total reserved shares	3,762,132	2,663,371