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Income Taxes | 6 Months Ended
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Jun. 30, 2026
Income Tax Disclosure [Abstract] |
Income Taxes | 11. Income Taxes The Company maintains a full valuation allowance against its net deferred tax assets through June 30, 2026. The Company files income taxes in the U.S. federal jurisdiction, the state of California and various other U.S. states. The state of California contested the Company’s tax position on revenue apportionment for upfront and milestone payments resulting from the Company’s collaboration and licensing agreements for the years 2017 and 2018. In September 2023, the Company received Notice of Proposed Assessment (“NOPA”) from the Franchise Tax Board. The Company recorded an uncertain tax position of $4.5 million in long-term liabilities for the proposed tax assessment, penalties and interest through June 30, 2026. Additional utilization of carryforward attributes and indirect federal tax effects of the assessment would result in a reduction in deferred tax assets of $5.0 million. The Company filed a protest to contest the proposed assessment in November 2023. Due to the ongoing nature of the examination and discussion s with the state of California, the Company is unable to estimate a date by which this matter will be resolved.

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