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Income Taxes (Tables)

12 Months Ended

Dec. 31, 2023

Income Tax Disclosure [Abstract]

Schedule of Loss Before Income Taxes

For financial reporting purposes, loss before income taxes includes the following components (in thousands):

		Year Ended December 31,
		2023				2022				2021
Domestic		$	(106,833	)		$	(113,558	)		$	(65,415	)
Foreign			(1,380	)			283				203
Loss before income taxes		$	(108,213	)		$	(113,275	)		$	(65,212	)

Schedule of Provision for Income Taxes

The provision for income taxes consists of the following (in thousands):

		Year Ended December 31,
		2023				2022				2021
Current:
Federal		$	(9	)		$	—			$	—
State			3				5				—
Foreign			35				66				43
Total current			29				71				43
Deferred:
Foreign			54				(31	)			(29	)
Total deferred			54				(31	)			(29	)
Provision for income taxes		$	83			$	40			$	14

Summary of Income Tax Provision Related to Continuing Operations Statutory Income Tax Rate

Income tax provision related to continuing operations differ from the amounts computed by applying the statutory income tax rate of 21% to pretax loss as follows:

		Year Ended December 31,
		2023		2022		2021
Expected tax (benefit) at federal statutory rate		(21%)		(21%)		(21%)
Effect of:
State taxes		(7%)		(6%)		(9%)
Change in valuation allowance		26%		28%		36%
Stock-based compensation		3%		1%		(3%)
Research and development credit		(3%)		(2%)		(3%)
Other		2%		–%		–%
Effective tax rate		–%		–%		–%

Components of Deferred Tax Assets for Federal and State Income Taxes

Significant components of the Company’s deferred tax assets for federal and state income taxes are as follows (in thousands):

		December 31,
		2023				2022
Deferred tax assets:
Net operating loss carryforwards		$	83,983			$	72,408
Research and development credits			22,669				16,824
Capitalized research and development			22,089				11,972
Deferred revenue			362				38
Accruals and reserves			2,883				1,914
Stock-based compensation			4,614				5,197
Operating lease liabilities			13,124				13,455
Other intangibles			209				267
Other			132				236
Total gross deferred tax assets			150,065				122,311
Less: valuation allowance			(144,861	)			(114,483	)
Total deferred tax assets			5,204				7,828
Deferred tax liabilities:
Property and equipment			(113	)			(108	)
Operating lease right-of-use assets			(5,084	)			(7,659	)
Total deferred tax liabilities			(5,197	)			(7,767	)
Net deferred tax assets		$	7			$	61

Summary of Unrecognized Tax Benefits

The Company has the following activity relating to unrecognized tax benefits (in thousands):

		December 31,
		2023				2022
Beginning balance		$	4,240			$	3,066
Gross increase—tax position in prior periods			162				-
Gross increase—tax position in current period			1,299				1,174
Ending balance		$	5,701			$	4,240

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Tabular disclosure of the components of income tax expense attributable to continuing operations for each year presented including, but not limited to: current tax expense (benefit), deferred tax expense (benefit), investment tax credits, government grants, the benefits of operating loss carryforwards, tax expense that results from allocating certain tax benefits either directly to contributed capital or to reduce goodwill or other noncurrent intangible assets of an acquired entity, adjustments of a deferred tax liability or asset for enacted changes in tax laws or rates or a change in the tax status of the entity, and adjustments of the beginning-of-the-year balances of a valuation allowance because of a change in circumstances that causes a change in judgment about the realizability of the related deferred tax asset in future years.

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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 of income before income tax between domestic and foreign jurisdictions.

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Tabular disclosure of the change in unrecognized tax benefits.

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