Stock-Based Compensation (Tables)

9 Months Ended

Sep. 30, 2024

Share-Based Payment Arrangement [Abstract]

Schedule of Stock-based Compensation Expense

Stock-based compensation expense for stock options, RSUs and PSUs is reflected in the condensed consolidated statements of operations and comprehensive loss as follows (in thousands):

	Three months ended September 30,				Nine months ended September 30,
	2024		2023		2024		2023
General and administrative	$	1,315	$	1,639	$	3,965	$	5,578
Research and development	577		535		1,586		1,917
Total	$	1,892	$	2,174	$	5,551	$	7,495

Schedule of Stock Option Activity

The following table summarizes the Company's stock option activity:

	Number of Shares	Weighted Average Exercise Price		Weighted Average Remaining Contractual Life (Years)	Aggregate Intrinsic Value (In Thousands)
Options outstanding at December 31, 2023	13,161,228	$	2.38	7.86	$	337
Granted	3,965,725	0.96
Exercised	(284,788)	0.57			183
Forfeited	(677,354)	3.71
Options outstanding at September 30, 2024	16,164,811	$	2.01	7.7	$	1,949
Vested and expected to vest at September 30, 2024	16,164,811	$	2.01	7.7	$	1,949
Options exercisable at September 30, 2024	9,602,087	$	2.40	6.8	$	1,072

Schedule of RSU Activity

The following table summarizes the Company's unvested RSU activity:

	Number of Shares	Weighted Average Grant Date Fair Value
RSUs unvested at December 31, 2023	2,982,661	$	1.63
Granted	39,738	$	0.51
Vested	(994,042)	$	1.94
Forfeited	(56,405)	$	1.64
RSUs unvested at September 30, 2024	1,971,952	$	1.46

Schedule of PSU Activity

The following table summarizes the unvested PSU activity:

	Number of Shares	Weighted Average Grant-Date Fair Value
PSUs unvested at December 31, 2023	—	$	—
Granted	872,352	$	1.71
Vested	—	$	—
Forfeited	—	$	—
PSUs unvested at September 30, 2024	872,352	$	1.71