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Gross Amounts and Dates of Expiration of Tax Credits and Carryovers (Detail) - USD ($) $ in Thousands | Dec. 31, 2022 | Dec. 31, 2021
--- | --- | ---
Income Tax Disclosure [Line Items] |  |
Federal losses carryovers | $ 616,922 |
California loss carryovers | 75,192 |
Other state loss carryovers | 37,687 |
Research credits | 29,242 | $ 29,411
Federal foreign tax credits | 610 |
Federal |  |
Income Tax Disclosure [Line Items] |  |
Research credits | 18,036 |
California |  |
Income Tax Disclosure [Line Items] |  |
Research credits | 14,186 |
Expires 2023-2025 |  |
Income Tax Disclosure [Line Items] |  |
Federal losses carryovers | 69,647 |
Other state loss carryovers | 601 |
Expires 2023-2025 | Federal |  |
Income Tax Disclosure [Line Items] |  |
Research credits | 3,758 |
Expires 2026-2032 |  |
Income Tax Disclosure [Line Items] |  |
Federal losses carryovers | 186,833 |
California loss carryovers | 46,641 |
Other state loss carryovers | 364 |
Federal foreign tax credits | 610 |
Expires 2026-2032 | Federal |  |
Income Tax Disclosure [Line Items] |  |
Research credits | 1,483 |
Expires 2033-2042 |  |
Income Tax Disclosure [Line Items] |  |
Federal losses carryovers | 169,673 |
California loss carryovers | 28,551 |
Other state loss carryovers | 36,722 |
Expires 2033-2042 | Federal |  |
Income Tax Disclosure [Line Items] |  |
Research credits | 12,795 |
No Expiration |  |
Income Tax Disclosure [Line Items] |  |
Federal losses carryovers | 190,769 |
No Expiration | California |  |
Income Tax Disclosure [Line Items] |  |
Research credits | $ 14,186 |

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