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Income Taxes (Tables)

12 Months Ended

Dec. 31, 2024

Income Tax Disclosure [Abstract]

Schedule of Loss Before Income Taxes, Domestic and Foreign

Our loss before provision for income taxes were as follows (in thousands): 

			Year Ended December 31,
			2024						2023						2022
United States			$	(65,231)					$	(76,169)					$	(33,269)
Foreign			(11)						(2)						(47)
Loss before provision for income taxes			$	(65,242)					$	(76,171)					$	(33,316)

Schedule of Components of Provision for Income Taxes

The components of the provision for income taxes are as follows (in thousands): 

			Year Ended December 31,
			2024						2023						2022
Current provision:
State			$	(6)					$	27					$	141
Foreign			42						42						142
Total current provision			36						69						283
Deferred benefit:
Foreign			(2)						—						(7)
Total deferred benefit			(2)						—						(7)
Provision for income taxes			$	34					$	69					$	276

Schedule of Reconciliation of Provision for Income Taxes Calculated at the Statutory Rate to Provision for Income Taxes

Reconciliation of the provision for income taxes calculated at the statutory rate to our provision for income taxes is as follows (in thousands): 

			Year Ended December 31,
			2024						2023						2022
Tax benefit at federal statutory rate			$	(13,701)					$	(15,995)					$	(6,996)
State taxes			(3,133)						(2,208)						(494)
Research and development credits			(419)						(925)						(1,793)
Foreign operations taxed at different rates			—						—						78
Stock-based compensation			1,930						1,967						239
Other nondeductible items			(108)						438						(238)
Executive compensation			306						152						80
Change in valuation allowance			15,159						16,640						9,400
Provision for income taxes			$	34					$	69					$	276

Schedule of Significant Components of Deferred Tax Assets and Liabilities

Significant components of our deferred tax assets and liabilities are as follows (in thousands): 

			December 31,
			2024						2023
Deferred tax assets:
Net operating losses			$	82,925					$	72,586
Credits			17,660						16,412
Deferred revenues			48						176
Stock-based compensation			4,786						4,445
Reserves and accruals			2,650						2,774
Property and Equipment			830						457
Intangible assets			244						532
Capital losses			452						424
R&D Capitalization			28,471						26,821
Unrealized gain/loss			2						—
Lease liability			7,445						3,608
Other assets			4,362						2,542
Total deferred tax assets:			149,875						130,777
Valuation allowance			(142,994)						(127,835)
Deferred tax liabilities:
Right-of-use assets			(6,895)						(2,958)
Total deferred tax liabilities:			(6,895)						(2,958)
Net deferred tax liabilities			$	(14)					$	(16)

Schedule of Federal, State and Foreign NOL Carryforwards and Federal Research and Development Tax Credits

The following table sets forth our federal, state and foreign NOL carryforwards and federal research and development tax credits as of December 31, 2024 (in thousands): 

			December 31, 2024
			Amount						Expiration Years
Net operating losses, federal			$	182,918					2026-2037
Net operating losses, federal			$	158,554					Do not expire
Net operating losses, state			$	175,040					2028-2044
Tax credits, federal			$	19,073					2024-2044
Tax credits, state			$	20,791					Do not expire

Schedule of Reconciliation of the Beginning and Ending Amount of Unrecognized Tax Benefits

A reconciliation of the beginning and ending amount of unrecognized tax benefits is as follows (in thousands): 

			December 31,
			2024						2023						2022
Balance at beginning of year			$	20,204					$	18,571					$	15,261
Additions based on tax positions related to current year			1,332						2,164						3,553
Additions to tax position of prior years			82						—						—
Reductions to tax position of prior years			—						(531)						(243)
Balance at end of year			$	21,618					$	20,204					$	18,571

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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 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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