Note 7 - Stockholders' Equity (Deficit) - Schedule of Dividends (Details) - USD ($)							3 Months Ended		9 Months Ended		12 Months Ended
	Aug. 22, 2025	Jul. 11, 2025	May 05, 2025	Mar. 17, 2025	Aug. 27, 2024	Mar. 06, 2024	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024	Dec. 31, 2024	Aug. 21, 2025	Jul. 10, 2025	Jun. 30, 2025	May 04, 2025	Mar. 16, 2025	Aug. 26, 2024	Mar. 05, 2024	Dec. 31, 2023
Conversion price (in dollars per share)												$ 2.19
Deemed dividends on Series F Preferred Stock, Series B and F Warrants and warrant exchange							$ 208,526	$ 1,450,232	$ 4,942,669	$ 6,707,687
Series F Warrants [Member]
Warrants, triggered (in shares)	456,621	2,054,762	593,247	593,247	137,334	54,695
Warrants, exercise price (in dollars per share)	$ 1.8149	$ 1.1908	$ 0.8294	$ 1.2	$ 20.19	$ 30	$ 0.8294	$ 30	$ 0.8294	$ 30		$ 2.19			$ 1.1
Warrants, deemed dividends	$ 16,059	$ 6,555	$ 36,504	$ 79,695	$ 216,546	$ 147,030
Total warrants, deemed dividends									$ 138,813		$ 363,576
Series F PS, Series B, and Series F Warrants [Member]
Total warrants, deemed dividends									4,942,669
Deemed dividends on Series F Preferred Stock, Series B and F Warrants and warrant exchange											6,699,936
Series F Warrant Modification [Member]
Total warrants, deemed dividends											7,751
Series F Preferred Stock and Series F Warrants After Modification [Member]
Deemed dividends on Series F Preferred Stock, Series B and F Warrants and warrant exchange											$ 6,707,687
Series B Warrants [Member]
Warrants, triggered (in shares)			6,777,101
Warrants, exercise price (in dollars per share)			$ 0.8294											$ 0.8294	1.9445
Warrants, deemed dividends			$ 2,426,968
Total warrants, deemed dividends									2,426,968
Series B Warrant Modifications [Member]
Total warrants, deemed dividends									$ 108,468
Minimum [Member] | Series F Warrants [Member]
Warrants, exercise price (in dollars per share)							0.8294		$ 0.8294				$ 1.19			$ 2.22	$ 23.15	$ 60.29
Maximum [Member] | Series F Warrants [Member]
Warrants, exercise price (in dollars per share)							1.4		1.4				1.26			5.25	37	124.5
Series F Convertible Preferred Stock [Member]
Preferred stock, triggered (in shares)	456,621	1,551,243	1,045,402	5,025	143,803	3,945
Conversion price (in dollars per share)	$ 1.8149	$ 1.1908	$ 0.8294	$ 1.2	$ 20.19	$ 30	$ 0	$ 0	$ 0	$ 0	$ 0				$ 1.1				$ 0
Preferred stock deemed dividend	$ 130,710	$ 55,202	$ 1,105,871	$ 976,637	$ 1,233,686	$ 5,102,674
Total Preferred Stock Deemed Dividends									$ 2,268,420		$ 6,336,360
Series F Convertible Preferred Stock [Member] | Minimum [Member]
Conversion price (in dollars per share)													1.19			2.22	23.15	60.29
Series F Convertible Preferred Stock [Member] | Maximum [Member]
Conversion price (in dollars per share)													$ 1.25			$ 5.25	$ 37	$ 124.5