Stockholders' Equity - Schedule of Future Issuance (Detail) - shares shares in Thousands	Sep. 30, 2023	Dec. 31, 2022
Class of Stock [Line Items]
Common stock shares reserved for future issuance (in shares)	182,772	165,630
Stock options outstanding
Class of Stock [Line Items]
Common stock shares reserved for future issuance (in shares)	43,306	51,591
Restricted Stock Units (“RSUs”) outstanding
Class of Stock [Line Items]
Common stock shares reserved for future issuance (in shares)	36,880	30,322
Performance Shares | Performance Stock Units (“PSUs”)
Class of Stock [Line Items]
Common stock shares reserved for future issuance (in shares)	990	415
Performance Shares | CEO Long-Term Performance Award
Class of Stock [Line Items]
Common stock shares reserved for future issuance (in shares)	11,500	11,500
2020 Equity Incentive Plan
Class of Stock [Line Items]
Common stock shares reserved for future issuance (in shares)	73,481	59,945
2020 Employee Stock Purchase Plan
Class of Stock [Line Items]
Common stock shares reserved for future issuance (in shares)	16,075	11,093
Stock warrants outstanding
Class of Stock [Line Items]
Common stock shares reserved for future issuance (in shares)	264	264
Unregistered stock awards (“RSAs”) outstanding
Class of Stock [Line Items]
Common stock shares reserved for future issuance (in shares)	276	500