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Income Taxes (Tables) | 12 Months Ended
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Dec. 31, 2024
Income Tax Disclosure [Abstract] |
Summary of reconciliation of income taxes computed using the U.S. federal statutory rate | A reconciliation of income taxes computed using the U.S. federal statutory rate to that reflected in operations follows (in thousands):
|  | Year Ended December 31, |
|  | 2024 |  |  | 2023 |
U.S. |  | $ | (3,060 | ) |  | $ | (5,181 | )
International |  |  | 3 |  |  |  | (82 | )
Loss before benefit from income taxes |  | $ | (3,057 | ) |  | $ | (5,263 | )
Income tax benefit using U.S. federal statutory rate |  | $ | (642 | ) |  | $ | (1,105 | )
State income taxes, net of federal benefit |  |  | (155 | ) |  |  | (5 | )
Non-deductible share-based compensation |  |  | 22 |  |  |  | (9 | )
Share-based compensation - shortfalls/(windfalls) |  |  | 70 |  |  |  | 1,196 |
Permanent differences |  |  | (4 | ) |  |  | 1 |
Tax credits |  |  | (11 | ) |  |  | (500 | )
Other |  |  | 0 |  |  |  | 17 |
Change in valuation allowance |  |  | 720 |  |  |  | 405 |
|  | $ | — |  |  | $ | — |
Summary of deferred tax assets (liabilities) | Deferred tax assets (liabilities) consist of the following as of December 31, 2024 and 2023 (in thousands):
|  | Year Ended December 31, |
|  | 2024 |  |  | 2023 |
Deferred tax assets: |  |  |  |  |  |
Net operating loss carryforwards |  | $ | 53,281 |  |  | $ | 48,535 |
Tax credit carryforwards |  |  | 10,383 |  |  |  | 10,388 |
Share-based compensation |  |  | 7,122 |  |  |  | 7,071 |
Capitalized research and development |  |  | 12,370 |  |  |  | 16,440 |
Accruals and reserves |  |  | — |  |  |  | 2 |
Total deferred tax assets |  | $ | 83,156 |  |  | $ | 82,436 |
Valuation allowance |  |  | (83,156 | ) |  |  | (82,436 | )
Net deferred tax assets |  | $ | — |  |  | $ | — |

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- Definition Tabular disclosure of the components of net deferred tax asset or liability recognized in an entity's statement of financial position, including the following: the total of all deferred tax liabilities, the total of all deferred tax assets, the total valuation allowance recognized for deferred tax assets. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482685/740-10-50-2 + 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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