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Note 2 - Significant Accounting Policies (Details Textual) - USD ($)	Mar. 31, 2026	Dec. 31, 2025
Retained Earnings (Accumulated Deficit), Total	$ (170,608,000)	$ (168,349,000)
Cash and Cash Equivalents, at Carrying Value, Total	$ 951,000	$ 2,496,000
Cash, Percentage Held in One Financial Institution	100.00%
Cash, Uninsured Amount	$ 704,000

X

- Definition

Percentage of cash held in one financial institution.

+ References

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.

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X

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The amount of cash as of the balance sheet date that is not insured by the Federal Deposit Insurance Corporation.

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Amount of accumulated undistributed earnings (deficit).

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