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v3.26.1

Related Party Transactions - Additional Information (Details) - USD ($) |  |  | 3 Months Ended | 6 Months Ended |
--- | --- | --- | --- | --- | ---
Apr. 14, 2026 | Jul. 25, 2025 | Jun. 30, 2026 | Jun. 30, 2025 | Jun. 30, 2026 | Jun. 30, 2025 | Dec. 31, 2025
Related Party Transaction [Line Items] |  |  |  |  |  |  |
Research and development expense |  |  | $ 6,669,000 | $ 5,653,000 | $ 12,630,000 | $ 9,693,000 |
Total general and administrative expense |  |  | 5,115,000 | $ 1,705,000 | 11,233,000 | $ 4,460,000 |
Reimbursement of research and development expenses, received |  |  |  |  | 600,000 |  |
Prepaid expenses and other current assets |  |  | 4,959,000 |  | 4,959,000 |  | $ 4,939,000
Maximum |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |
Reimbursement of research and development expenses |  |  | 100,000 |  | 100,000 |  |
Transition Services Agreement | Miragene |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |
Research and development expense |  |  | 100,000 |  | 300,000 |  |
Total general and administrative expense |  |  |  |  | 100,000 |  |
Service agreement amount paid |  |  |  |  | 200,000 |  |
Prepaid expenses |  |  |  |  |  |  | 200,000
Transition Services Agreement | Maximum | Miragene |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |
Total general and administrative expense |  |  | 100,000 |  |  |  |
Prepaid expenses |  |  | 100,000 |  | 100,000 |  |
Promissory Note | Non-OX40 Divestiture |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |
Note receivable value |  | $ 8,900,000 | $ 8,900,000 |  | 8,900,000 |  |
Proceeds from interest received |  |  |  |  | $ 0 |  |
Potential milestone license proceeds used to pay note receivable percentage |  |  |  |  | 50.00% |  |
Promissory Note | Non-OX40 Divestiture | Maximum |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |
Note receivable maturity year |  |  |  |  | 2035 |  |
Promissory Note | Non-OX40 Divestiture | Interest Receivable |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |
Promissory note accrues interest at annual rate |  |  | 4.61% |  | 4.61% |  |
Voting Common Stock | Pre-funded Warrants | 2026 Private Placement |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |
Warrants issued and sold to purchase warrant shares | 5,770,335 |  |  |  |  |  |
Purchase price of warrants | $ 5.199 |  |  |  |  |  |
Gross proceeds from issuance of warrants | $ 30,000,000 |  |  |  |  |  |
Extension Term | Transition Services Agreement | Miragene |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |
Service agreement term |  | 6 months |  |  |  |  |
Initial Term Period | Transition Services Agreement | Miragene |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |
Service agreement term |  | 6 months |  |  |  |  |
Related Party | Accounts Receivable |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |
Prepaid expenses and other current assets |  |  |  |  |  |  | $ 500,000
Affiliated Entity | 2026 Private Placement | Minimum |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |
Percentage of stockholders owning company's sotck | 5.00% |  |  |  |  |  |
Affiliated Entity | Voting Common Stock | Pre-funded Warrants | 2026 Private Placement |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |
Purchase price of warrants | $ 5.199 |  |  |  |  |  |
Gross proceeds from issuance of warrants | $ 11,500,000 |  |  |  |  |  |
Affiliated Entity | Voting Common Stock | Pre-funded Warrants | 2026 Private Placement | Maximum |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |
Warrants issued and sold to purchase warrant shares | 2,211,961 |  |  |  |  |  |

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Data Type: | na
Balance Type: |
Period Type: |