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Gross Amounts and Dates of Expiration of Tax Credits and Carryovers (Detail) - USD ($) $ in Thousands | Dec. 31, 2023 | Dec. 31, 2022
--- | --- | ---
Income Tax Disclosure [Line Items] |  |
Federal losses carryovers | $ 590,870 |
California loss carryovers | 104,900 |
Other state loss carryovers | 44,257 |
Research credits | 28,567 | $ 29,242
Federal foreign tax credits | 610 |
Federal |  |
Income Tax Disclosure [Line Items] |  |
Research credits | 16,758 |
California |  |
Income Tax Disclosure [Line Items] |  |
Research credits | 14,948 |
Expires 2024-2026 |  |
Income Tax Disclosure [Line Items] |  |
Federal losses carryovers | 60,190 |
Other state loss carryovers | 115 |
Expires 2024-2026 | Federal |  |
Income Tax Disclosure [Line Items] |  |
Research credits | 1,403 |
Expires 2027-2033 |  |
Income Tax Disclosure [Line Items] |  |
Federal losses carryovers | 191,075 |
California loss carryovers | 67,161 |
Other state loss carryovers | 1,685 |
Federal foreign tax credits | 610 |
Expires 2027-2033 | Federal |  |
Income Tax Disclosure [Line Items] |  |
Research credits | 1,808 |
Expires 2034-2043 |  |
Income Tax Disclosure [Line Items] |  |
Federal losses carryovers | 148,686 |
California loss carryovers | 37,739 |
Other state loss carryovers | 31,503 |
Expires 2034-2043 | Federal |  |
Income Tax Disclosure [Line Items] |  |
Research credits | 13,547 |
No Expiration |  |
Income Tax Disclosure [Line Items] |  |
Federal losses carryovers | 190,919 |
Other state loss carryovers | 10,954 |
No Expiration | California |  |
Income Tax Disclosure [Line Items] |  |
Research credits | $ 14,948 |

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