Stock Based Compensation (Tables)

3 Months Ended

Mar. 31, 2024

Share-Based Payment Arrangement [Abstract]

Schedule of Share-Based Compensation Expense

The Company recognized stock-based compensation expense in the Condensed Consolidated Statements of Operations as follows (in thousands):

	Three Months Ended March 31,
	2024		2023
Research and development	$	116	$	519
General and administrative		301		1,054
Total stock-based compensation expense	$	417	$	1,573

Schedule of Option Activity for Share-Based Payment Arrangement

The following table shows a summary of all stock option activity for the three months ended March 31, 2024:

	Number of Underlying Shares			Weighted- Average Exercise Price Per Share		Weighted- Average Contractual Life Remaining in Years		Aggregate Intrinsic Value
Outstanding as of January 1, 2024		17,506,345		$	1.79			$	554,525
Granted		145,834			1.41
Forfeited		(269,321	)		1.18
Exercised		—			—
Expired		(880	)		396.00
Outstanding as of March 31, 2024		17,381,978		$	1.77		6.86	$	8,351,067
Exercisable as of March 31, 2024		15,321,414		$	1.90		6.57	$	6,336,295
Vested and expected to vest		17,381,978		$	1.77		6.86	$	8,351,067