Stockholders' Equity (Tables)

12 Months Ended

Dec. 31, 2019

Equity [Abstract]

Summary of Shares of Common Stock Reserved for Future Issuance

The Company has reserved for future issuance the following number of shares of common stock:

	As of December 31,
	2019		2018
Options to purchase common stock		5,418,113		4,414,225
Shares available for future grant		1,409,019		1,412,159
2018 Employee Stock Purchase Plan		534,544		256,818
Shares available from ATM offering		9,989,419		—
Total reserved		17,351,095		6,083,202