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Summary of Significant Accounting Policies (Tables) | 6 Months Ended
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Jun. 30, 2025
Accounting Policies [Abstract] |
Summary of Disaggregated Amounts of Operating Expenses | The following table presents information about reported segment loss and significant segment expenses for the three and six months ended June 30, 2025 and 2024 (in thousands):
|  | Three Months Ended June 30, |  |  | Six Months Ended June 30, |
|  | 2025 |  |  | 2024 |  |  | 2025 |  |  | 2024 |
Segment research and development (a) (b) |  | $ | (3,664 | ) |  | $ | (3,959 | ) |  | $ | (7,704 | ) |  | $ | (6,724 | )
Segment general and administrative (a) (b) |  |  | (1,769 | ) |  |  | (2,069 | ) |  |  | (3,661 | ) |  |  | (4,643 | )
Stock-based compensation (see Note 7) |  |  | (1,174 | ) |  |  | (486 | ) |  |  | (1,724 | ) |  |  | (900 | )
Depreciation expense |  |  | (14 | ) |  |  | (15 | ) |  |  | (29 | ) |  |  | (29 | )
Operating loss |  | $ | (6,621 | ) |  | $ | (6,529 | ) |  | $ | (13,118 | ) |  | $ | (12,296 | )
Reconciliation of profit or loss |  |  |  |  |  |  |  |  |  |  |  |
Adjustments and reconciling items |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Consolidated operating loss |  | $ | (6,621 | ) |  | $ | (6,529 | ) |  | $ | (13,118 | ) |  | $ | (12,296 | )
a) Stock-based compensation expense of $381,000 and $190,000 related to research and development and $793,000 and $296,000 related to general and administrative have been excluded for the three months ended June 30, 2025 and 2024. Stock-based compensation expense of $559,000 and $361,000 related to research and development and $1,165,000 and $539,000 related to general and administrative have been excluded for the six months ended June 30, 2025 and 2024. All amounts are included within stock-based compensation expense. b) Depreciation expense of $7,000 and $8,000 related to research and development and $7,000 and $7,000 related to general and administrative have been excluded for the three months ended June 30, 2025 and 2024. Depreciation expense of $13,000 and $16,000 related to research and development and $16,000 and $13,000 related to general and administrative have been excluded for the six months ended June 30, 2025 and 2024. All amounts are included within depreciation expense.

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- Definition Tabular disclosure of the profit or loss and total assets for each reportable segment. An entity discloses certain information on each reportable segment if the amounts (a) are included in the measure of segment profit or loss reviewed by the chief operating decision maker or (b) are otherwise regularly provided to the chief operating decision maker, even if not included in that measure of segment profit or loss. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 25 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482810/280-10-50-25 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 22 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482810/280-10-50-22 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 30 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482810/280-10-50-30 + Details
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