Condensed Consolidated Statements of Operations and Comprehensive Loss (Unaudited) - USD ($) shares in Thousands, $ in Thousands |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Jun. 30, 2026 |
Jun. 30, 2025 |
Jun. 30, 2026 |
Jun. 30, 2025 |
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| Income Statement [Abstract] | ||||
| Grant revenue | $ 81 | $ 290 | $ 157 | $ 632 |
| Operating expenses: | ||||
| Research and development | 21,544 | 16,620 | 42,916 | 30,952 |
| General and administrative | 7,795 | 7,709 | 14,780 | 15,551 |
| Total operating expenses | 29,339 | 24,329 | 57,696 | 46,503 |
| Operating loss | (29,258) | (24,039) | (57,539) | (45,871) |
| Non-operating income (expense): | ||||
| Interest income | 2,347 | 2,159 | 4,544 | 4,543 |
| Interest and other expense | (71) | (119) | (176) | (247) |
| Other income from a related party (Note 3) | 0 | 0 | 0 | 1,400 |
| Equity in loss of affiliate | (1) | 0 | (1) | (1) |
| Total non-operating income, net | 2,275 | 2,040 | 4,367 | 5,695 |
| Net loss from continuing operations | (26,983) | (21,999) | (53,172) | (40,176) |
| Net gain from discontinued operations | 197 | 514 | 197 | 514 |
| Net loss before deferred income tax benefit | (26,786) | (21,485) | (52,975) | (39,662) |
| Deferred income tax benefit | 0 | 0 | 0 | 0 |
| Net loss | $ (26,786) | $ (21,485) | $ (52,975) | $ (39,662) |
| Basic and diluted loss per share: | ||||
| Loss from continuing operations, Basic | $ (0.22) | $ (0.3) | $ (0.47) | $ (0.55) |
| Loss from continuing operations, Diluted | (0.22) | (0.3) | (0.47) | (0.55) |
| Gain from discontinued operations, Basic | 0 | 0.01 | 0 | 0.01 |
| Gain from discontinued operations, Diluted | 0 | 0.01 | 0 | 0.01 |
| Basic loss per share | (0.22) | (0.29) | (0.47) | (0.54) |
| Diluted loss per share | $ (0.22) | $ (0.29) | $ (0.47) | $ (0.54) |
| Weighted average number of shares used in computing net loss per share: | ||||
| Basic | 120,651 | 74,235 | 112,174 | 73,301 |
| Diluted | 120,651 | 74,235 | 112,174 | 73,301 |
| Unrealized gain (loss) on available-for-sale securities | $ 5 | $ (16) | $ (331) | $ 54 |
| Comprehensive loss | $ (26,781) | $ (21,501) | $ (53,306) | $ (39,608) |
| X | ||||||||||
- Definition Interest and other expense. No definition available.
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| X | ||||||||||
- Definition Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income, attributable to parent entity. Excludes changes in equity resulting from investments by owners and distributions to owners. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of deferred income tax expense (benefit) pertaining to income (loss) from continuing operations. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount before tax of income (loss) from a discontinued operation. Includes, but is not limited to, the income (loss) from operations during the phase-out period, gain (loss) on disposal, gain (loss) for reversal of write-down (write-down) to fair value, less cost to sell, and adjustments to a prior period gain (loss) on disposal. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Per basic share amount, after tax, of income (loss) from the day-to-day business activities of the discontinued operation. No definition available.
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- Definition Per diluted share amount, after tax, of income (loss) from the day-to-day business activities of the discontinued operation. No definition available.
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- References No definition available.
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| X | ||||||||||
- Definition The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition The aggregate total of expenses of managing and administering the affairs of an entity, including affiliates of the reporting entity, which are not directly or indirectly associated with the manufacture, sale or creation of a product or product line. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Amount of income (loss) from continuing operations, including income (loss) from equity method investments, before deduction of income tax expense (benefit), and income (loss) attributable to noncontrolling interest. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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| X | ||||||||||
- Definition The amount of net income (loss) from continuing operations per each share of common stock or unit outstanding during the reporting period. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition The amount of net income (loss) derived from continuing operations during the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Amount of income (loss) for proportionate share of equity method investee's income (loss). Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Amount, before tax, of income (loss) including portion attributable to noncontrolling interest. Includes, but is not limited to, income (loss) from continuing operations, discontinued operations and equity method investments. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- References No definition available.
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| X | ||||||||||
- Definition Amount before accretion (amortization) of purchase discount (premium) of interest income on nonoperating securities. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition The portion of profit or loss for the period, net of income taxes, which is attributable to the parent. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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| X | ||||||||||
- Definition The aggregate amount of income or expense from ancillary business-related activities (that is to say, excluding major activities considered part of the normal operations of the business). Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- References No definition available.
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| X | ||||||||||
- Definition Generally recurring costs associated with normal operations except for the portion of these expenses which can be clearly related to production and included in cost of sales or services. Includes selling, general and administrative expense. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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| X | ||||||||||
- References No definition available.
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| X | ||||||||||
- Definition The net result for the period of deducting operating expenses from operating revenues. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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| X | ||||||||||
- Definition Amount, after tax and before adjustment, of unrealized holding gain (loss) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). Excludes unrealized gain (loss) on investment in debt security measured at amortized cost (held-to-maturity) from transfer to available-for-sale. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Amount of income related to nonoperating activities, classified as other. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of expense for research and development. Includes, but is not limited to, cost for computer software product to be sold, leased, or otherwise marketed and writeoff of research and development assets acquired in transaction other than business combination or joint venture formation or both. Excludes write-down of intangible asset acquired in business combination or from joint venture formation or both, used in research and development activity. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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| X | ||||||||||
- Definition Amount of revenue that is not accounted for under Topic 606. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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| X | ||||||||||
- Definition The average number of shares or units issued and outstanding that are used in calculating diluted EPS or earnings per unit (EPU), determined based on the timing of issuance of shares or units in the period. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- References No definition available.
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| X | ||||||||||
- Definition Number of [basic] shares or units, after adjustment for contingently issuable shares or units and other shares or units not deemed outstanding, determined by relating the portion of time within a reporting period that common shares or units have been outstanding to the total time in that period. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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