Note 2 - Summary of Significant Accounting Policies - Schedule of Earnings Per Share (Details) - USD ($)		3 Months Ended		9 Months Ended
		Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Net income (loss)		$ (2,615,163)	$ (3,459,754)	$ 3,164,500	$ (12,705,049)
Accrued dividends on Series F Preferred Stock		36,112	47,879	155,800	158,862
Deemed dividends		(208,526)	(1,450,232)	(4,942,669)	(6,707,687)
Numerator for basic EPS - net income (loss) available to common stockholders		(2,859,801)	(4,957,865)	(1,933,969)	(19,571,598)
Accrued dividends on Series F Preferred Stock		0	0	155,800	0
Interest expense on convertible note payable		0	0	45,150	0
Gain on change in fair value of warrant liabilities		0	0	(8,511,000)	0
Numerator for diluted EPS - net loss available to common stockholders		$ (2,859,801)	$ (4,957,865)	$ (10,244,019)	$ (19,571,598)
Denominator for basic EPS - weighted average shares (in shares)	[1]	32,171,261	309,350	19,888,046	240,309
Incremental shares for warrants (in shares)		0	0	0	0
Convertible Series F Preferred Stock (in shares)		0	0	2,143,977	0
Unvested restricted stock units (in shares)		0	0	106,797	0
Denominator for diluted EPS - weighted average shares (in shares)	[1]	32,171,261	309,350	22,199,793	240,309
Net loss per common share - basic (in dollars per share)		$ (0.09)	$ (16.03)	$ (0.1)	$ (81.44)
Net loss per common share - diluted (in dollars per share)		$ (0.09)	$ (16.03)	$ (0.46)	$ (81.44)
Series A Warrants [Member]
Incremental shares for warrants (in shares)		0	0	60,973	0

[1] Adjusted for the effect of a 1 to 50 reverse stock split that became effective on October 14, 2024 (see Note 1)