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Equity Incentive Plans (Tables)

9 Months Ended

Sep. 30, 2024

Share-Based Payment Arrangement [Abstract]

Schedule of Stock Option Activity

The following table summarizes stock option activity during the nine months ended September 30, 2024:

			Shares Subject to Options Outstanding												Weighted- Average
			Shares						Weighted- Average Exercise Price						Remaining Contractual Life (Years)						Aggregate Intrinsic Value
																					(in thousands)
Outstanding as of December 31, 2023			23,626,115						$	2.52					7.9						$	369
Options granted			12,602,228						$	0.96
Options exercised			—						$	—
Options forfeited/cancelled			(1,132,943)						$	1.85
Outstanding as of September 30, 2024			35,095,400						$	1.98					7.7						$	1,212
Options vested and expected to vest as of September 30, 2024			35,095,400						$	1.98					7.7						$	1,212
Options exercisable as of September 30, 2024			12,484,553						$	3.55					5.9						$	19

Schedule of Restricted Stock Activity

The summary of the Company’s restricted stock activity during the nine months ended September 30, 2024 is as follows:

			Number of Restricted Stock Units Outstanding						Weighted- Average Grant Date Fair Value
Nonvested at December 31, 2023			427,698						$	10.92
Granted			—						—
Vested			(427,698)						10.92
Forfeited			—						—
Nonvested at September 30, 2024			—						$	—

Schedule of Stock-Based Compensation Expense Reported in Condensed Consolidated Statements of Operations

Stock-based compensation expense has been reported in the Company’s 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
Research and development			$	2,329					$	3,250					$	7,752					$	12,661
General and administrative			2,513						2,912						7,902						9,825
Total stock-based compensation expense			$	4,842					$	6,162					$	15,654					$	22,486

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Tabular disclosure of cost recognized for award under share-based payment arrangement by plan. Includes, but is not limited to, related tax benefit.

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-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (h)(1)
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Tabular disclosure of activity for award under share-based payment arrangement. Includes, but is not limited to, outstanding award at beginning and end of year, granted, exercised, forfeited, and weighted-average grant date fair value.

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Tabular disclosure of the number and weighted-average grant date fair value for restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock units that were granted, vested, or forfeited during the year.

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