Common Stock - Schedule of Common Stock Reserved for Future Issuance (Details) - shares	Dec. 31, 2023	Dec. 31, 2022
Class of Stock [Line Items]
Common stock, shares reserved for future issuance (in shares)	24,715,971	16,249,546
Shares underlying outstanding stock options
Class of Stock [Line Items]
Common stock, shares reserved for future issuance (in shares)	4,012,903	3,402,574
Shares underlying unvested restricted stock units
Class of Stock [Line Items]
Common stock, shares reserved for future issuance (in shares)	4,346,785	3,687,888
Shares underlying unvested market-based restricted stock units
Class of Stock [Line Items]
Common stock, shares reserved for future issuance (in shares)	2,260,764	2,260,764
Shares underlying unvested performance-based restricted stock units
Class of Stock [Line Items]
Common stock, shares reserved for future issuance (in shares)	412,490	341,713
Shares available for issuance under the 2018 Incentive Award Plan
Class of Stock [Line Items]
Common stock, shares reserved for future issuance (in shares)	7,053,406	5,438,296
Shares available for issuance under the 2018 Employee Stock Purchase Plan
Class of Stock [Line Items]
Common stock, shares reserved for future issuance (in shares)	1,679,635	1,118,311
Shares available for issuance under the 2023 Employment Inducement Incentive Award Plan
Class of Stock [Line Items]
Common stock, shares reserved for future issuance (in shares)	4,949,988	0