Summary of Significant Accounting Policies (Tables)

3 Months Ended

Mar. 31, 2021

Accounting Policies [Abstract]

Schedule of Potentially Dilutive Securities not Included in Calculation of Diluted Net Loss Per Share

Potentially dilutive securities not included in the calculation of diluted net loss per share, because to do so would be anti-dilutive, are as follows (in common stock equivalent shares; in thousands):

	March 31,
	2021		2020
Convertible preferred stock		—		17,921
Warrant to purchase convertible preferred stock		—		8
Warrant to purchase common stock		—		9
Common stock options issued and outstanding		5,523		2,414
Common stock subject to repurchase or forfeiture		48		142
ESPP shares pending issuance		13		—
Total		5,584		20,494