Equity Incentive Plans (Tables)

6 Months Ended

Jun. 30, 2024

Equity Incentive Plans

Schedule of Stock Option Activity

	Options Outstanding
				Weighted
				Average
		Weighted		Remaining
		Average		Contractual	Aggregate
		Exercise		Term	Intrinsic
	Shares	Price		(Years)	Value (in thousands)
Outstanding at December 31, 2023	3,165,216	$	5.04	5.9	$	429
Granted	1,784,054	$	3.38			—
Exercised	(37,282)	$	3.38		$	24
Forfeited/Cancelled/Expired	(266,251)	$	15.36			—
Outstanding at June 30, 2024	4,645,737	$	3.83	7.1	$	144
Vested and expected to vest at June 30, 2024	4,645,737	$	3.83	7.1	$	144
Exercisable at June 30, 2024	2,627,743	$	4.14	5.3	$	144

Schedule of Restricted Stock Awards and Restricted Stock Unit Activity

		Weighted Avg
		Grant Date
	Shares	Fair Value
Outstanding at December 31, 2023	200,000	$	2.39
Granted	90,000	$	3.38
Outstanding at June 30, 2024	290,000	$	2.70

Schedule of Assumptions Used in the Black-Scholes Model

	Six Months Ended June 30,
	2024	2023
Risk-free interest rate	4.24% - 4.25%	3.54% - 4.2%
Expected volatility	89.4% - 92.5%	90.99% - 91.58%
Expected term (in years)	5.12 - 7.0	5.5 - 7.00
Expected dividend yield	0%	0%

Schedule of Stock-Based Compensation Expenses

The table below summarizes the total share-based compensation expense included in the Company’s condensed consolidated statements of operations for the periods presented (in thousands):

	Three Months Ended June 30,				Six Months Ended June 30,
	2024		2023		2024		2023
Research and development	$	323	$	259	$	375	$	804
General and administrative		1,012		2		1,494		314
Total stock-based compensation expense	$	1,335	$	261	$	1,869	$	1,118