Stock-Based Compensation (Tables)

9 Months Ended

Sep. 30, 2022

Stock-Based Compensation

Estimation Using Black-Scholes Option Pricing Model With Following Weighted Average Assumptions

	Three Months Ended			Nine Months Ended
	September 30, 2022			September 30, 2022
Risk-free interest rate		3.56	%		2.86	%
Expected volatility		75.75	%		74.94	%
Expected term (years)		5.74			5.65
Expected dividend yield		0.00	%		0.00	%
Fair value per option	$	0.36		$	1.09

Summary of Stock-Based Compensation Expense is Classified in Condensed Consolidated Statements of Operations and Comprehensive Loss

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2022		2021		2022		2021
Cost of sales	$	4	$	2	$	11	$	5
Selling, general and administrative		1,367		582		1,837		3,351
Research and development		70		156		174		540
Total stock-based compensation expense	$	1,441	$	740	$	2,022	$	3,896