Deferred tax assets tax credit carryforwards research expire.

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Deferred tax assets tax credit carryforwards research not expire.

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Income Taxes [Line Items]

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Net Operating Loss Carryforward Annual Limitation

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Operating Loss Carryforwards Subject To Limitation

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Research and Development Credits, Begin to Expire

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Amount before allocation of valuation allowances of deferred tax asset attributable to deductible domestic operating loss carryforwards. Excludes state and local operating loss carryforwards.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 8
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Amount before allocation of valuation allowances of deferred tax asset attributable to deductible operating loss carryforwards that are not subject to expiration dates.

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Amount before allocation of valuation allowances of deferred tax asset attributable to deductible state and local operating loss carryforwards.

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Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized.

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A description of the limitations on the use of all operating loss carryforwards available to reduce future taxable income.

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Amount of expense for interest on an underpayment of income taxes and penalties related to a tax position claimed or expected to be claimed in the tax return.

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Amount of increase (decrease) in the valuation allowance for a specified deferred tax asset.

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Income Taxes - Additional Information (Detail) - USD ($)	1 Months Ended	12 Months Ended
	Aug. 31, 2004	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Income Taxes [Line Items]
Valuation allowance of deferred tax asset		$ 705,034,000	$ 695,094,000
Change in the valuation allowance		9,940,000	19,631,000	$ 4,846,000
Federal operating loss carryforwards		2,200,000,000
State operating loss carryforwards		1,700,000,000
Federal operation loss carryforwards, not subject to expiration		$ 499,600,000
Operating loss carryforwards, limitations on use		Pursuant to IRC Sections 382 and 383, annual use of the Company’s federal and California net operating loss and research and development credit carryforwards may be limited in the event a cumulative change in ownership of more than 50% occurs within a three-year period.
Net operating loss carryforwards	$ 105,800,000
Net operating loss and credit carryforwards, annual use limitation	$ 13,000,000.0
Research and development credits begin to expire		2023
Research and development credits expire		$ 1,100,000
Unrecognized income tax interest and penalties		0	$ 0	$ 0
Federal
Income Taxes [Line Items]
Research and development credits not expire		$ 54,200,000
Research and development credits begin to expire		2024
State
Income Taxes [Line Items]
Research and development credits not expire		$ 24,600,000
New Jersey
Income Taxes [Line Items]
Research and development credits begin to expire		2023
Connecticut
Income Taxes [Line Items]
Research and development credits not expire		$ 19,800,000
California
Income Taxes [Line Items]
Research and development credits not expire		$ 200,000