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Income Taxes (Tables)

12 Months Ended

Dec. 31, 2023

Income Tax Disclosure [Abstract]

Schedule of Reconciliation of Provision for Income Taxes Computed at Statutory Federal Income Tax Rate to Provision for Income Taxes

A reconciliation of the provision for income taxes computed at the statutory federal income tax rate to the provision for income taxes as reflected in the financial statements is as follows:

		Years Ended December 31,
		2023				2022				2021
Income tax computed at federal statutory rate			21.0	%			21.0	%			21.0	%
State taxes, net of federal benefit			13.2	%			2.5	%			2.9	%
General business credit carryovers			1.5	%			1.0	%			-5.0	%
Non-deductible expenses			-1.0	%			-0.2	%			-0.5	%
Change in valuation allowance			-34.9	%			-24.1	%			-19.2	%
Return to provision true up			0.0	%			-0.2	%			0.0	%
Other			0.0	%			0.0	%			0.8	%
			-0.2	%			0.0	%			0.0	%

Components of Deferred Tax

The significant components of the Company’s deferred tax are as follows (in thousands):

		Years Ended December 31,
		2023				2022
Deferred tax assets (liabilities):
Net operating loss carryforwards		$	32,664			$	23,650
Research and development credits			11,765				8,124
Capitalized start-up and other costs			68,859				45,374
Capitalized research and development costs			79,562				48,917
Equity based compensation			10,276				5,004
Accruals			2,795				1,985
Other temporary differences			36				27
Deferred tax assets before valuation allowance			205,957				133,081
Valuation allowances			(205,957	)			(133,081	)
Net deferred tax assets		$	—			$	—

Summary of Reconciliation of Company's Unrecognized Tax Benefits

A reconciliation of the Company’s unrecognized tax benefits is as follows (in thousands):

		Years Ended December 31,
		2023				2022				2021
Unrecognized tax benefit--beginning of year		$	143			$	163			$	163
Decreases related to prior period positions			—				(20	)			—
Unrecognized tax benefit--end of year		$	143			$	143			$	163

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Tabular disclosure of the components of net deferred tax asset or liability recognized in an entity's statement of financial position, including the following: the total of all deferred tax liabilities, the total of all deferred tax assets, the total valuation allowance recognized for deferred tax assets.

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Tabular disclosure of the reconciliation using percentage or dollar amounts of the reported amount of income tax expense attributable to continuing operations for the year to the amount of income tax expense that would result from applying domestic federal statutory tax rates to pretax income from continuing operations.

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Tabular disclosure for tax positions taken in the tax returns filed or to be filed for which it is more likely than not that the tax position will not be sustained upon examination by taxing authorities and other income tax contingencies. Includes, but is not limited to, interest and penalties, reconciliation of unrecognized tax benefits, unrecognized tax benefits that would affect the effective tax rate, tax years that remain subject to examination by tax jurisdictions, and information about positions for which it is reasonably possible that amounts unrecognized will significantly change within 12 months.

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