Common Stock (Tables)

12 Months Ended

Dec. 31, 2020

Equity [Abstract]

Schedule of Shares Reserved for Future Issuance

Shares reserved for future issuance

	December 31,
	2020		2019
Conversion of redeemable convertible preferred stock		—		18,442,233
Exercises of outstanding stock option awards		2,993,855		1,337,501
Shares of common stock available for future grants under the 2015 Equity Incentive    Plan, as amended		—		567,110
Shares of common stock available for future grants under the 2020 Equity Incentive    Plan		3,644,459		—
Shares of common stock available for future issuance under the 2020 ESPP		700,000		—
Total shares reserved for future issuance		7,338,314		20,346,844