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Income Taxes - Additional Information (Detail) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Income Tax Disclosure [Line Items] |  |  |
Provision for income taxes | $ 2,022 | $ 1,143 | $ 808
Increase (decrease) in valuation allowance | 1,500 | 300 |
Net operating loss carryforwards | 353,500 |  |
Unrecognized tax benefits | 12,101 | 11,339 | $ 5,615
Unrecognized tax benefits would affect the effective tax rate | 0 |  |
Interest related to unrecognized tax benefits | 0 | 0 |
Penalties related to unrecognized tax benefits | 0 | $ 0 |
Federal |  |  |
Income Tax Disclosure [Line Items] |  |  |
Net operating loss carryforwards | $ 23,100 |  |
Federal | Minimum |  |  |
Income Tax Disclosure [Line Items] |  |  |
Net operating loss carryforwards, expiration year | 2024 |  |
Federal | Research And Development Tax Credits |  |  |
Income Tax Disclosure [Line Items] |  |  |
Tax credit carryforward amount | $ 28,300 |  |
Federal | Research And Development Tax Credits | Minimum |  |  |
Income Tax Disclosure [Line Items] |  |  |
Tax credit carryforward amount, expiration year | 2024 |  |
Federal | Research And Development Tax Credits | Maximum |  |  |
Income Tax Disclosure [Line Items] |  |  |
Tax credit carryforward amount, expiration year | 2043 |  |
California and Other States |  |  |
Income Tax Disclosure [Line Items] |  |  |
Net operating loss carryforwards | $ 283,900 |  |
California and Other States | Minimum |  |  |
Income Tax Disclosure [Line Items] |  |  |
Net operating loss carryforwards, expiration year | 2024 |  |
California and Other States | Maximum |  |  |
Income Tax Disclosure [Line Items] |  |  |
Net operating loss carryforwards, expiration year | 2040 |  |
California State | Research And Development Tax Credits |  |  |
Income Tax Disclosure [Line Items] |  |  |
Tax credit carryforward amount | $ 22,300 |  |
Foreign |  |  |
Income Tax Disclosure [Line Items] |  |  |
Net operating loss carryforwards | $ 0 |  |

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- Definition Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 250 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 8 -Publisher FASB -URI https://asc.fasb.org//1943274/2147483443/250-10-50-8 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 250 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 9 -Publisher FASB -URI https://asc.fasb.org//1943274/2147483443/250-10-50-9 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 10 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482685/740-10-50-10 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -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 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 22 -Subparagraph (h) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482810/280-10-50-22 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Topic 944 -SubTopic 220 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04(9)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147483586/944-220-S99-1 Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Name Accounting Standards Codification -Section 45 -Paragraph 2 -Subparagraph (a) -SubTopic 20 -Topic 740 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482659/740-20-45-2 Reference 8: http://www.xbrl.org/2003/role/disclosureRef -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08(h)) -SubTopic 10 -Topic 235 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480678/235-10-S99-1 + Details
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