Redeemable Convertible Preferred Stock Warrants

9 Months Ended

Sep. 30, 2021

Disclosure Text Block [Abstract]

Redeemable Convertible Preferred Stock Warrants

10. Redeemable Convertible Preferred Stock Warrants

Warrants for Series D redeemable convertible preferred stock

A summary of the outstanding redeemable convertible preferred stock warrants is as follows (in thousands, except per share and share amounts):

				September 30, 2021
		Exercise price per share			Shares			Fair value of liability		Expiration date
Series D redeemable convertible preferred stock warrants	$		11.31			77,842	$		577	June 2029

				December 31, 2020
		Exercise price per share			Shares			Fair value of liability		Expiration date
Series D redeemable convertible preferred stock warrants	$		11.31			77,842	$		42	June 2029

The redeemable convertible preferred stock warrant liability was valued using the following assumptions under the Black-Scholes option-pricing model:

	September 30, 2021	December 31, 2020
Expected dividends	0%	0%
Expected volatility	51.3% -55.0%	48.2% -52.4%
Risk-free interest rate	1.1% -1.4%	0.6% -0.8%
Expected warrant life	5.6-7.8 years	6.4-8.6 years