Note 2 - Significant Accounting Policies (Details Textual) - USD ($) |
Jun. 30, 2025 |
Dec. 31, 2024 |
|---|---|---|
| Retained Earnings (Accumulated Deficit), Total | $ (164,882,000) | $ (160,121,000) |
| Cash and Cash Equivalents, at Carrying Value, Total | $ 980,000 | $ 2,371,000 |
| Cash, Percentage Held in One Financial Institution | 99.00% | |
| Cash, Uninsured Amount | $ 625,000 |
| X | ||||||||||
- Definition Percentage of cash held in one financial institution. No definition available.
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| X | ||||||||||
- Definition Amount of cash and cash equivalent. Cash includes, but is not limited to, currency on hand, demand deposit with financial institution, and account with general characteristic of demand deposit. Cash equivalent includes, but is not limited to, short-term, highly liquid investment that is both readily convertible to known amount of cash and so near maturity that it presents insignificant risk of change in value because of change in interest rate. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition The amount of cash as of the balance sheet date that is not insured by the Federal Deposit Insurance Corporation. No definition available.
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| X | ||||||||||
- Definition Amount of accumulated undistributed earnings (deficit). Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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