Summary of Significant Accounting Policies (Tables)

6 Months Ended

Jun. 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 June 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):

	June 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		2,862		258
Common stock subject to repurchase or forfeiture		120		204
ESPP shares pending issuance		3		—
Total		2,985		6,385