Stockholders' Equity - Common Stock Reserved for Future Issuance (Details) - shares	Jun. 30, 2022	Dec. 31, 2021
Class Of Stock [Line Items]
Common stock reserved for issuance (in shares)	113,017,059	106,320,711
2014 Stock Plan [Member] | Stock Options [Member]
Class Of Stock [Line Items]
Common stock reserved for issuance (in shares)	51,899,378	61,903,883
2014 Stock Plan [Member] | RSUs [Member]
Class Of Stock [Line Items]
Common stock reserved for issuance (in shares)	2,864,365	3,495,540
2021 Equity Incentive Plan [Member]
Class Of Stock [Line Items]
Common stock reserved for issuance (in shares)	36,782,187	32,797,245
2021 Equity Incentive Plan [Member] | Stock Options [Member]
Class Of Stock [Line Items]
Common stock reserved for issuance (in shares)	22,500	22,500
2021 Equity Incentive Plan [Member] | RSUs [Member]
Class Of Stock [Line Items]
Common stock reserved for issuance (in shares)	14,302,853	2,938,968
2021 Employee Stock Purchase Plan [Member]
Class Of Stock [Line Items]
Common stock reserved for issuance (in shares)	7,145,776	5,162,575