Common Stock - Schedule of Common Stock Reserved for Future Issuance (Details) - shares shares in Thousands	Dec. 31, 2023	Dec. 31, 2022
Class of Stock [Line Items]
Shares of common stock reserved (in shares)	104,014	97,579
2025 Notes | Convertible Debt
Class of Stock [Line Items]
Shares of common stock reserved (in shares)	0	5,503
2026 Notes | Convertible Debt
Class of Stock [Line Items]
Shares of common stock reserved (in shares)	10,311	10,311
Remaining shares available for issuance under the 2019 Plan
Class of Stock [Line Items]
Shares of common stock reserved (in shares)	56,442	44,693
Stock options issued and outstanding
Class of Stock [Line Items]
Shares of common stock reserved (in shares)	12,523	15,886
Outstanding and unsettled RSUs
Class of Stock [Line Items]
Shares of common stock reserved (in shares)	10,894	10,196
Shares issuable pursuant to the ESPP
Class of Stock [Line Items]
Shares of common stock reserved (in shares)	13,844	10,990