Note 4 - Certain Balance Sheet Components - Summary of Other Accrued Liabilities (Details) - USD ($) $ in Thousands |
Mar. 31, 2026 |
Dec. 31, 2025 |
Dec. 31, 2024 |
|---|---|---|---|
| Accrued compensation | $ 664 | $ 574 | $ 941 |
| Accrued clinical and manufacturing expenses | 173 | 190 | 617 |
| Accrued professional and consulting services | 644 | 594 | 51 |
| Other liabilities, current portion | 499 | 499 | 493 |
| Total other accrued liabilities, current portion | $ 1,980 | 1,857 | 2,102 |
| Other liabilities, noncurrent portion | 0 | 0 | |
| Total current and noncurrent other accrued liabilities | $ 1,857 | $ 2,102 |
| X | ||||||||||
- Definition Accrued clinical and manufacturing expenses. No definition available.
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| X | ||||||||||
- Definition Carrying value as of the balance sheet date of obligations incurred through that date and payable for professional fees, such as for legal and accounting services received. 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 Carrying value as of the balance sheet date of the obligations incurred through that date and payable for employees' services provided. 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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| X | ||||||||||
- Definition Amount of expenses incurred but not yet paid classified as other. 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 after one year or the normal operating cycle, if longer. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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| X | ||||||||||
- Definition Amount of liabilities classified as other, due within one year or the normal operating cycle, if longer. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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