Stock-Based Compensation (Tables)

6 Months Ended

Jun. 30, 2022

Stock-Based Compensation

Schedule of activity relating to RSUs

	Number of
	shares
Outstanding as of January 1, 2022	—
Granted	122
Forfeited	(3)
Outstanding as of June 30, 2022	119

Schedule of Stock Option Activity

	Number	Weighted average
	of	exercise
	shares	price per share
Outstanding as of January 1, 2022	4,000	$	18.89
Granted	1,068	$	15.24
Forfeited	(155)	$	30.25
Cancelled	(78)	$	54.00
Exercised	(38)	$	4.83
Outstanding as of June 30, 2022	4,797	$	17.25
Options vested and exercisable as of June 30, 2022	2,949	$	11.91

Schedule of Valuation Assumptions

	Six months ended						Six months ended
		June 30, 2022					June 30, 2021
Expected term		6.08	years	-	6.08	years	5.50	years	-	6.25	years
Expected stock price volatility		92.74	%	-	95.59	%	95.00	%	-	98.00	%
Risk-free rate of interest		2.41	%	-	3.03	%	0.96	%	-	1.22	%
Expected dividend		0.0	%	-	0.0	%	0.0	%	-	0.0	%

Schedule of stock-based compensation charges

	Three Months Ended June 30,				Six months ended June 30,
	2022		2021		2022		2021
Research and development	$	1,269	$	2,173	$	2,271	$	4,205
Selling, general and administrative		3,213		4,596		6,036		8,129
Total	$	4,482	$	6,769	$	8,307	$	12,334