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Income Taxes (Tables)

12 Months Ended

Dec. 31, 2023

Income Tax Disclosure [Abstract]

Schedule of Components of Loss Before Income Taxes

The following table presents domestic and foreign components of loss before provision for income taxes:

			Years ended December 31,
			2023						2022
			(In thousands)
U.S.			$	(118,089)					$	(154,002)
Foreign			(154)						(460)
Loss before income taxes			$	(118,243)					$	(154,462)

Schedule of Components of Income Tax (Benefit) Provision

The components of the Company’s income tax (benefit) provision were as follows:

			Years ended December 31,
			2023						2022
			(In thousands)
Current:
Foreign			$	(1,078)					$	74
Total current tax (benefit) provision			(1,078)						74
Deferred
Foreign			—						—
Total deferred tax provision			—						—
Total income tax (benefit) provision			$	(1,078)					$	74

Schedule of Reconciliation of Income Tax Expense Computed Statutory Federal Income Tax and Financial Statements

The income tax provision for the years ended December 31, 2023 and 2022 differed from the amounts computed by applying the statutory federal income tax rate of 21% to pretax loss as a result of the following:

			Years ended December 31,
			2023						2022
			(In thousands)
Federal income tax benefit at statutory rate			$	(24,831)					$	(32,437)
Stock compensation			6,001						3,414
Non-deductible expenses			21						52
Research and development tax credits			(1,810)						(2,529)
Change in valuation allowance			18,479						31,542
Foreign rate differential			(14)						(46)
Impact of internal reorganization			1,323						103
Uncertain tax positions			(1,078)						—
Other			831						(25)
Total tax (benefit) provision			$	(1,078)					$	74

Schedule of Deferred Tax Assets

The following table presents significant components of the Company’s deferred tax assets and liabilities:

			As of December 31,
			2023						2022
			(In thousands)
Deferred tax assets:
Net operating loss carryforwards			$	127,961					$	111,709
Accruals, reserve and other			1,760						2,053
Tax credit carryforwards			24,702						21,439
Stock-based compensation			7,305						10,705
Property and equipment			—						279
Intangibles			11						1,562
Lease obligation			17,708						26,241
Capital losses			9,850						9,850
Section 174 R&D capitalization			29,455						23,697
Total deferred tax assets before valuation allowance			218,752						207,535
Valuation allowance			(205,103)						(188,141)
Total deferred tax assets			13,649						19,394
Deferred tax liabilities:
Right-of-use assets			(12,335)						(19,394)
Property and equipment			(1,314)						—
Total deferred tax liabilities			$	(13,649)					$	(19,394)
Net deferred tax assets			$	—					$	—

Schedule of Unrecognized Tax Benefits

A reconciliation of the unrecognized tax benefits is as follows:

			Years ended December 31,
			2023						2022
			(In thousands)
Unrecognized tax benefits as of the beginning of the year			$	24,745					$	21,944
Increase related to tax positions taken during the prior year			43						274
Increase related to tax position take during the current year			3,301						2,527
Decrease related to tax position taken during the current year			(3,475)						—
Unrecognized tax benefits as of the end of the year			$	24,614					$	24,745

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