Stock-Based Compensation (Tables)

12 Months Ended

Dec. 31, 2022

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Summary of Stock Option Activity

The following table summarizes stock option activity under the Company’s equity incentive plans:

	Outstanding Stock Options			Weighted- Average Exercise Price Per Share		Weighted- Average Remaining Contractual Term (years)		Aggregate Intrinsic Value
	(in thousands, except per share amounts and years)
Outstanding as of December 31, 2021		703		$	21.95		5.8	$	4,100
Granted		97		$	27.03
Exercised		(11	)	$	9.16
Forfeited		(51	)	$	25.29
Expired		(5	)	$	9.16
Outstanding as of December 31, 2022		733		$	22.67		5.4	$	3,721
Exercisable as of December 31, 2022		575		$	21.37		4.7	$	3,616

Summary of Fair Value of Stock Options Granted for Employee and Non-Employee Awards

The fair value of stock options granted for employee and non-employee awards was estimated at the grant date using the Black-Scholes option pricing model based on the following assumptions:

	Years Ended December 31,
	2022	2021
Expected volatility	84.2%-86.0%	89.2%-91.5%
Expected term (years)	3.0-7.0	3.0-6.2
Risk-free interest rate	1.6%-2.9%	0.3%-1.1%
Expected dividend yield	0%-0%	0%-0%

Summary of Companies Restricted Stock Activity

The following table summarizes the Company’s restricted stock activity consisting of RSUs:

	Number of Restricted Stock (RSUs)			Weighted-Average Grant Date Fair Value Per Share
	(in thousands, excepts per share amounts)
Outstanding and unvested as of December 31, 2021		143		$	31.98
Granted		37		$	27.47
Forfeited		(5	)	$	31.25
Outstanding and unvested as of December 31, 2022		175		$	31.10

Summary of Total Stock-Based Compensation

The following table summarizes total stock-based compensation included in the Company’s consolidated statements of operations:

	Years Ended December 31,
	2022		2021
	(in thousands)
Research and development	$	2,957	$	1,307
General and administrative		2,231		547
Total stock-based compensation	$	5,188	$	1,854