Stockholders' Equity (Deficit) - Disclosure of Future Issuance (Detail) - shares shares in Thousands	Jun. 30, 2022	Dec. 31, 2021
Class of Stock [Line Items]
Common stock shares reserved for future issuance (in shares)	173,880	148,863
Stock options outstanding
Class of Stock [Line Items]
Common stock shares reserved for future issuance (in shares)	55,921	63,267
RSUs outstanding
Class of Stock [Line Items]
Common stock shares reserved for future issuance (in shares)	21,909	14,684
PSUs outstanding | CEO Long-Term Performance Award
Class of Stock [Line Items]
Common stock shares reserved for future issuance (in shares)	11,500	11,500
PSUs outstanding | 2022 PSU Grants
Class of Stock [Line Items]
Common stock shares reserved for future issuance (in shares)	415	0
Shares available for issuance under Equity Incentive Plan
Class of Stock [Line Items]
Common stock shares reserved for future issuance (in shares)	71,839	52,811
2020 ESPP
Class of Stock [Line Items]
Common stock shares reserved for future issuance (in shares)	11,333	5,809
Stock Warrants outstanding
Class of Stock [Line Items]
Common stock shares reserved for future issuance (in shares)	264	324
Unregistered restricted stock awards outstanding
Class of Stock [Line Items]
Common stock shares reserved for future issuance (in shares)	699	468