Summary of Significant Accounting Policies (Tables)

9 Months Ended

Sep. 30, 2020

Accounting Policies [Abstract]

Schedule of Reconciliation of Preferred Stock Warrant Liability Measured at Fair Value Using Level 3 Unobservable Inputs

The following table provides a reconciliation of the preferred stock warrant liability measured at fair value using Level 3 unobservable inputs (in thousands):

Balance at December 31, 2019	$	45
Change in fair value		75
Reclassification of preferred stock warrant liability    to stockholders’ equity		(120	)
Balance at September 30, 2020	$	—

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):

	September 30,
	2020		2019
Convertible preferred stock		—		5,906
Warrant to purchase convertible preferred stock		—		8
Warrant to purchase common stock		—		9
Common stock options issued and outstanding		3,545		230
Common stock subject to repurchase or forfeiture		92		213
ESPP shares pending issuance		19		—
Total		3,656		6,366