Note 3 - Balance Sheet Details - Summary of Accrued Liabilities (Details) - USD ($) $ in Thousands |
Jun. 30, 2026 |
Dec. 31, 2025 |
|---|---|---|
| Notes To Financial Statements [Abstract] | ||
| Accrued accounts payable | $ 173 | $ 163 |
| Accrued clinical trial expenses | 806 | 801 |
| Accrued chemistry, manufacturing and controls ("CMC") expenses | 833 | 543 |
| Accrued preclinical and translational science expenses | 992 | 188 |
| Accrued director stipends | 64 | 59 |
| Accrued other | 268 | 433 |
| Accrued Liabilities, current, Total | $ 3,136 | $ 2,187 |
| X | ||||||||||
- Definition Represents the amount of accrued accounts payable, included in accrued liabilities rather than in the Accounts Payable line item. No definition available.
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| X | ||||||||||
- Definition Accrued chemistry, manufacturing and controls expenses. No definition available.
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| X | ||||||||||
- Definition Represents the amount of accrued clinical trial costs as of the balance sheet date. No definition available.
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| X | ||||||||||
- Definition Represents the amount of accrued director stipends as of the balance sheet date. No definition available.
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| X | ||||||||||
- Definition Accrued preclinical and translational science expenses. No definition available.
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| X | ||||||||||
- Definition Notes To Financial Statements Abstract No definition available.
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| X | ||||||||||
- Definition Carrying value as of the balance sheet date of obligations incurred and payable, pertaining to costs that are statutory in nature, are incurred on contractual obligations, or accumulate over time and for which invoices have not yet been received or will not be rendered. Examples include taxes, interest, rent and utilities. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer). Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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| X | ||||||||||
- Definition Amount of expenses incurred but not yet paid classified as other, due within one year or the normal operating cycle, if longer. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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