Convertible Preferred Stock and Stockholders’ Deficit (Tables)

9 Months Ended

Sep. 30, 2021

Equity [Abstract]

Summary of Preferred Stock

The following table summarizes information related to issuance of the Company’s preferred stock (in thousands, except number of shares and per share amounts):

	As of December 31, 2020
	Par Value		Date of Issuance	Shares Price at Issuance		Shares Authorized(1)		Shares Issued and Outstanding(1)		Liquidation Preference		Carrying Value (2) Share Capital
Series A	$	0.001	Feb-2000	$	40.81		355,921		355,903	$	14,523	$	13,535
Series B	$	0.001	May-2003	$	9.07		1,741,452		1,741,399		15,795		39,715
Series C	$	0.001	Feb-2007	$	12.92		1,168,344		1,168,311		15,086		28,136
Series D	$	0.001	Aug-2009	$	18.08		663,808		663,728		12,000		18,503
Series E	$	0.001	Oct-2011	$	20.66		353,339		353,327		7,300		10,350
Series F	$	0.001	May-2012	$	25.83		507,744		499,159		12,891		18,305
Series G	$	0.001	Jun-2015	$	12.40		5,832,685		5,788,878		71,759		135,682
Series H	$	0.001	Feb-2017	$	12.40		5,949,499		3,805,567		47,174		89,074
							16,572,792		14,376,272	$	196,528	$	353,300

(1)The shares authorized, issued and outstanding do not reflect any anti-dilution provisions of Series C, Series D, Series E and Series F as a result of the Series G financing.

(2)The carrying value reflects the gross proceeds received from the sale of the preferred stock less issuance costs and the fair value at issuance of preferred stock warrants classified as a liability, plus accretion of redemption value.

Summary of Common Stock Reserved for Future Issuance

Common stock reserved for future issuance consisted of the following:

	September 30, 2021		December 31, 2020
Conversion of preferred stock		—		14,851,007
Preferred stock warrants		—		225,945
Common stock warrant		—		1
Stock options issued and outstanding under the 2006, 2015 and 2021 plans		5,454,112		4,201,935
Restricted stock units		657,729		—
Total shares of common stock reserved		6,111,841		19,278,888