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Note 2 - Summary of Significant Accounting Policies - Schedule of Earnings Per Share (Details) - USD ($)
 3 Months Ended 6 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 2025
Jun. 30, 2024
Net income (loss) $ (1,280,376) $ (2,929,708) $ 5,779,663 $ (9,245,295)
Accrued dividends on Series F Preferred Stock 52,038 49,748 119,688 110,983
Deemed dividends (3,677,811) (7,751) (4,734,143) (5,257,455)
Numerator for basic EPS - net income (loss) available to common stockholders (5,010,225) (2,987,207) 925,832 (14,613,733)
Accrued dividends on Series F Preferred Stock 0 0 119,688 0
Interest expense on convertible note payable 0 0 45,150 0
Gain on change in fair value of warrant liabilities 0 0 (8,506,000) 0
Numerator for diluted EPS - net loss available to common stockholders $ (5,010,225) $ (2,987,207) $ (7,415,330) $ (14,613,733)
Denominator for basic EPS - weighted average shares (in shares) [1] 15,524,049 247,728 13,835,214 205,788
Incremental shares for outstanding warrants (in shares) 0 0 4,837,593 0
Convertible Series F Preferred Stock (in shares) 0 0 2,485,654 0
Unvested restricted stock units (in shares) 0 0 68,797 0
Denominator for diluted EPS - weighted average shares (in shares) [1] 15,524,049 247,728 21,227,258 205,788
Net income (loss) per common share - basic (in dollars per share) $ (0.32) $ (12.06) $ 0.07 $ (71.01)
Net loss per common share - diluted (in dollars per share) $ (0.32) $ (12.06) $ (0.35) $ (71.01)
[1] Adjusted for the effect of a 1 to 50 reverse stock split that became effective on October 14, 2024 (see Note 1)