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Income Taxes (Tables) | 12 Months Ended
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Dec. 31, 2025
Income Tax Disclosure [Abstract] |
Schedule of Loss Before Income Taxes | The Company's loss before income taxes is as follows:
(in thousands) |  | Years ended December 31, |
|  | 2025 |  |  | 2024 |
U.S. Domestic |  | $ | (45,851 | ) |  | $ | (45,431 | )
Loss before income taxes |  | $ | (45,851 | ) |  | $ | (45,431 | )
Provision for Income Tax (Benefit) Expense | The provision for i ncome tax (benefit) expense consists of the following:
|  | Years ended December 31, |
(in thousands) |  | 2025 |  |  | 2024 |
Current: |  |  |  |  |  |
Federal |  | $ | — |  |  | $ | — |
State |  |  | — |  |  |  | — |
Total current income tax (benefit) expense |  |  | — |  |  |  | — |
Deferred: |  |  |  |  |  |
Federal |  |  | (8,615 | ) |  |  | (8,697 | )
State |  |  | (213 | ) |  |  | (566 | )
Total deferred income tax (benefit) expense |  |  | (8,828 | ) |  |  | (9,263 | )
Valuation allowance |  |  | 8,828 |  |  |  | 9,263 |
Total income tax (benefit) expense |  | $ | — |  |  | $ | — |
Schedule of Significant Components of the Company's Taxes and the Rates | Significant components of the Company’s taxes and the rates are shown below:
|  | Years ended December 31, |
(in thousands, except percentages) |  | 2025 |  |  | 2024 |
US federal statutory rate |  | $ | (9,628 | ) |  |  | 21.0 | % |  | $ | (9,540 | ) |  |  | 21.0 | %
State and local taxes net of federal income tax effect(1) |  |  | (408 | ) |  |  | 0.9 | % |  |  | 1 |  |  |  | — | %
Tax Credits: |  |  |  |  |  |  |  |  |  |  |  |
Research and development credits |  |  | (591 | ) |  |  | 1.3 | % |  |  | (642 | ) |  |  | 1.4 | %
Change in valuation allowance |  |  | 8,615 |  |  |  | (18.8 | )% |  |  | 8,816 |  |  |  | (19.4 | )%
Nontaxable or Nondeductible Items: |  |  |  |  |  |  |  |  |  |  |  |
Officers' compensation |  |  | 348 |  |  |  | (0.7 | )% |  |  | 588 |  |  |  | (1.3 | )%
Stock-based compensation |  |  | 432 |  |  |  | (1.0 | )% |  |  | 488 |  |  |  | (1.1 | )%
Other |  |  | 5 |  |  |  | — | % |  |  | 5 |  |  |  | — | %
Other adjustments |  |  | 400 |  |  |  | (0.9 | )% |  |  | 284 |  |  |  | (0.6 | )%
Change in unrecognized tax benefits |  |  | 827 |  |  |  | (1.8 | )% |  |  | — |  |  |  | — | %
Effective income tax rate |  | $ | — |  |  |  | — | % |  | $ | — |  |  |  | — | %
(1) Income tax rate associated with the state of California.
Schedule of Significant Components of the Company's Deferred Tax Assets and Liabilities | Significant components of the Company’s deferred tax assets and liabilities from federal and state income taxes are shown below:
|  | Years ended December 31, |
(in thousands) |  | 2025 |  |  | 2024 |
Deferred tax assets: |  |  |  |  |  |
Tax loss carryforwards |  | $ | 31,977 |  |  | $ | 27,374 |
Research and development credits and other tax credits |  |  | 4,685 |  |  |  | 4,556 |
Stock-based compensation |  |  | 1,645 |  |  |  | 1,252 |
Capitalized research and development |  |  | 17,597 |  |  |  | 14,209 |
Operating lease liabilities |  |  | 180 |  |  |  | 327 |
Other |  |  | 1,314 |  |  |  | 967 |
Total deferred tax assets |  |  | 57,398 |  |  |  | 48,685 |
Deferred tax liabilities: |  |  |  |  |  |
Operating lease right-of-use assets |  |  | (136 | ) |  |  | (251 | )
Total deferred tax liabilities |  |  | (136 | ) |  |  | (251 | )
Net deferred tax assets before valuation allowance |  |  | 57,262 |  |  |  | 48,434 |
Valuation allowance |  |  | (57,262 | ) |  |  | (48,434 | )
Net deferred tax asset |  | $ | — |  |  | $ | — |
Schedule of Changes in Valuation Allowance | A summary of changes to the Company's valuation allowance is presented below:
|  | Years ended December 31, |
(in thousands) |  | 2025 |  |  | 2024 |
Deferred Tax Assets - Valuation Allowance |  |  |  |  |  |
Balance at beginning of year |  | $ | 48,434 |  |  | $ | 39,171 |
Federal increase/(decrease) charge to expenses |  |  | 8,615 |  |  |  | 8,816 |
State increase/(decrease) charge to expenses |  |  | 213 |  |  |  | 447 |
Balance at end of year |  | $ | 57,262 |  |  | $ | 48,434 |
Schedule of Unrecognized Tax Benefits | The Company's gross unrecognized tax benefits are as follows:
|  | Years ended December 31, |
(in thousands) |  | 2025 |  |  | 2024 |
Unrecognized tax benefits |  |  |  |  |  |
Beginning balance |  | $ | — |  |  | $ | — |
Increases related to prior year tax positions |  |  | 777 |  |  |  | — |
Increases related to current year tax positions |  |  | 158 |  |  |  | — |
Balance at end of year |  | $ | 935 |  |  | $ | — |
Schedule of Cash Taxes Paid | The amounts of cash taxes paid are as follows:
(in thousands) |  | Years ended December 31, |
|  | 2025 |  |  | 2024 |
Current: |  |  |  |  |  |
Federal |  | $ | — |  |  | $ | — |
State: |  |  |  |  |  |
California |  |  | 1 |  |  |  | 1 |
Cash paid for income taxes |  | $ | 1 |  |  | $ | 1 |

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- Definition Tabular disclosure of the components of income tax expense attributable to continuing operations for each year presented including, but not limited to: current tax expense (benefit), deferred tax expense (benefit), investment tax credits, government grants, the benefits of operating loss carryforwards, tax expense that results from allocating certain tax benefits either directly to contributed capital or to reduce goodwill or other noncurrent intangible assets of an acquired entity, adjustments of a deferred tax liability or asset for enacted changes in tax laws or rates or a change in the tax status of the entity, and adjustments of the beginning-of-the-year balances of a valuation allowance because of a change in circumstances that causes a change in judgment about the realizability of the related deferred tax asset in future years. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 9 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482685/740-10-50-9 + Details
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- Definition Tabular disclosure of the reconciliation using percentage or dollar amounts of the reported amount of income tax expense attributable to continuing operations for the year to the amount of income tax expense that would result from applying domestic federal statutory tax rates to pretax income from continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 231 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482663/740-10-55-231 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 12A -Publisher FASB -URI https://asc.fasb.org/1943274/2147482685/740-10-50-12A Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 12 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482685/740-10-50-12 + Details
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