Quarterly report [Sections 13 or 15(d)]

Note 2 - Summary of Significant Accounting Policies - Schedule of Earnings Per Share, Basic, by Common Class, Including Two Class Method (Details)

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Note 2 - Summary of Significant Accounting Policies - Schedule of Earnings Per Share, Basic, by Common Class, Including Two Class Method (Details) - USD ($)
 3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Net loss $ (4,051,000) $ (4,230,000)
Preferred Dividends paid in shares of common stock (253,000) (1,000)
Net loss attributable to common stockholders $ (4,304,000) $ (4,231,000)