Fair Value Measurements and Fair Value of Financial Instruments (Tables)

12 Months Ended

Dec. 31, 2021

Summary of Assumptions Used in Black-Scholes Option Pricing Model

The assumptions used in the Black-Scholes option pricing model to determine the fair value of the Series C convertible preferred stock warrant liability at the date of the IPO and December 31, 2020 were as follows:

	IPO Date			December 31, 2020
Fair value of underlying preferred stock	$	1.90		$	0.83
Risk-free interest rate		1.70	%		1.70	%
Expected volatility		70.00	%		70.00	%
Expected term (in years)		9.0			9.2
Expected dividend yield	—%			—%

Summary of Activity of Financial Instruments

The following table summarizes the activity of the financial instruments valued using Level 3 inputs (in thousands):

	Acquisition-related Consideration Held in Escrow			Convertible Preferred Stock Warrant Liability			Series D Convertible Preferred Stock Purchase Right Liability
Balance at December 31, 2019	$	3,500		$	—		$	—
Acquisition-related consideration released from escrow		(3,500	)		—			—
Issuance of Series C convertible preferred stock warrants		—			79			—
Issuance of Series D convertible preferred stock purchase right liability		—			—			3,900
Change in fair value		—			(15	)		—
Balance at December 31, 2020		—			64			3,900
Change in fair value		—			105			980
Reclassification of warrant liability to equity due to conversion from preferred stock warrant to common stock warrant upon completion of initial public offering		—			(169	)		—
Settlement of Series D convertible preferred stock purchase right liability								(4,880	)
Balance at December 31, 2021	$	—		$	—		$	—