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Gross Amounts and Dates of Expiration of Tax Credits and Carryovers (Detail) - USD ($) $ in Thousands | Dec. 31, 2024 | Dec. 31, 2023
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Income Tax Disclosure [Line Items] |  |
Federal losses carryovers | $ 559,551 |
California loss carryovers | 108,685 |
Other state loss carryovers | 45,090 |
Research credits | 29,739 | $ 28,567
Federal foreign tax credits | 610 |
Federal |  |
Income Tax Disclosure [Line Items] |  |
Research credits | 17,074 |
California |  |
Income Tax Disclosure [Line Items] |  |
Research credits | 16,011 |
Expires 2025-2027 |  |
Income Tax Disclosure [Line Items] |  |
Federal losses carryovers | 58,345 |
Other state loss carryovers | 128 |
Federal foreign tax credits | 610 |
Expires 2025-2027 | Federal |  |
Income Tax Disclosure [Line Items] |  |
Research credits | 1,279 |
Expires 2028-2034 |  |
Income Tax Disclosure [Line Items] |  |
Federal losses carryovers | 193,684 |
California loss carryovers | 67,796 |
Other state loss carryovers | 2,762 |
Expires 2028-2034 | Federal |  |
Income Tax Disclosure [Line Items] |  |
Research credits | 1,927 |
Expires 2035-2044 |  |
Income Tax Disclosure [Line Items] |  |
Federal losses carryovers | 116,604 |
California loss carryovers | 40,889 |
Other state loss carryovers | 30,630 |
Expires 2035-2044 | Federal |  |
Income Tax Disclosure [Line Items] |  |
Research credits | 13,868 |
No Expiration |  |
Income Tax Disclosure [Line Items] |  |
Federal losses carryovers | 190,918 |
Other state loss carryovers | 11,570 |
No Expiration | California |  |
Income Tax Disclosure [Line Items] |  |
Research credits | $ 16,011 |

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