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Income Taxes - Additional Information (Detail) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023
Income Taxes [Line Items] |  |
Effective income tax rate continuing operations | 0.00% | 0.00%
Current federal tax expense benefit | $ 0 | $ 0
Current state and local tax expense benefit | 0 | 0
Valuation allowance deferred tax asset change in amount | 140,000 |
Deferred tax assets operating loss carryforwards not subject to expiration | 399,300 |
Deferred tax assets operating loss carryforwards domestic | 399,300 |
Deferred tax assets operating loss carryforwards state and local | $ 71,900 |
Amortization period foreign R&D costs | 15 years |
Amortization period R&D activities | 5 years |
Deferred tax liabilities deferred expense capitalized research and development costs | $ 40,300 |
Expiration Through 2040 [Member] |  |
Income Taxes [Line Items] |  |
Deferred tax assets operating loss carryforwards state and local | 71,900 |
Domestic Country [Member] | Expiration Through 2040 [Member] |  |
Income Taxes [Line Items] |  |
Deferred tax assets tax credit carryforwards research | 10,500 |
Federal [Member] |  |
Income Taxes [Line Items] |  |
Current federal tax expense benefit | 0 | 0
State and Local Jurisdiction [Member] |  |
Income Taxes [Line Items] |  |
Current state and local tax expense benefit | 0 | $ 0
State and Local Jurisdiction [Member] | Expiration Through 2035 [Member] |  |
Income Taxes [Line Items] |  |
Deferred tax assets tax credit carryforwards research | $ 4,400 |

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- Definition Amount of current federal tax expense (benefit) attributable to income (loss) from continuing operations. Includes, but is not limited to, current national tax expense (benefit) for non-US (United States of America) jurisdiction. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 6.I.7) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479360/740-10-S99-1 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 235 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08(h)(1)(Note 1)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480678/235-10-S99-1 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Name Accounting Standards Codification -Section 50 -Paragraph 9 -Subparagraph (a) -SubTopic 10 -Topic 740 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482685/740-10-50-9 + Details
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