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Income Taxes - Additional Information (Detail) - USD ($) $ in Millions | 9 Months Ended |
--- | --- | ---
Sep. 30, 2025 | Dec. 31, 2007
CALIFORNIA |  |
Income Tax [Line Items] |  |
Net operating loss carryforwards | $ 75.2 |
Federal Income Tax |  |
Income Tax [Line Items] |  |
Net operating loss carryforwards | $ 193.4 | $ 156.5
Net operating loss carryforwards expiration year | 2037 |
Net operating loss carryforwards having indefinite life | $ 191.9 |
State Income Tax |  |
Income Tax [Line Items] |  |
Net operating loss carryforwards | $ 13.8 |
Net operating loss carryforwards expiration year | 2034 |

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- Definition Amount of operating loss carryforward, before tax effects, available to reduce future taxable income under enacted tax laws. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482685/740-10-50-3 + Details
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