Note 6 - Stockholders' Equity and Equity-linked Instruments - Schedule of Warrant Activity (Details) - USD ($) |
3 Months Ended | |||
|---|---|---|---|---|
Mar. 31, 2025 |
Mar. 31, 2024 |
|||
| Change in fair value of warrant liability | $ (717,000) | $ 761,000 | ||
| Beginning balance | 218,000 | 2,332,000 | ||
| Series AAA-3 and AAA-4 Junior Preferred Stock Warrants [Member] | ||||
| Beginning balance | [1] | 348,000 | 0 | |
| Change in fair value of warrant liability | (270,000) | 0 | ||
| Beginning balance | 78,000 | 0 | ||
| Warrants Issued With Placement Agent Agreement [Member] | ||||
| Beginning balance | 587,000 | 1,571,000 | ||
| Change in fair value of warrant liability | (447,000) | 761,000 | ||
| Beginning balance | $ 140,000 | $ 2,332,000 | ||
| ||||
| X | ||||||||||
- Definition Amount of expense (income) related to adjustment to fair value of warrant liability. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Definition Value of outstanding derivative securities that permit the holder the right to purchase securities (usually equity) from the issuer at a specified price. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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| X | ||||||||||
- Details
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| X | ||||||||||
- Details
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