Note 7 - Stockholders' Equity (Deficit) (Details Textual) - USD ($)																										1 Months Ended		3 Months Ended		9 Months Ended		23 Months Ended	27 Months Ended
	Sep. 19, 2025	Aug. 22, 2025	Jul. 24, 2025		Jul. 21, 2025	Jul. 18, 2025	Jul. 11, 2025	Jun. 17, 2025	Jun. 09, 2025	Jun. 06, 2025	Jun. 05, 2025	[2]	May 05, 2025	Apr. 25, 2025	Apr. 02, 2025	Mar. 17, 2025		Feb. 07, 2025		Aug. 26, 2024	Jul. 25, 2024	May 31, 2024	Apr. 12, 2024	Mar. 06, 2024	Jun. 26, 2022	Jul. 31, 2025	Apr. 30, 2025	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024	Aug. 21, 2025	Jul. 17, 2025	Jul. 15, 2025	Jul. 10, 2025	Jun. 30, 2025	May 31, 2025	May 04, 2025	Mar. 16, 2025	Dec. 31, 2024	Aug. 27, 2024	Mar. 05, 2024	Dec. 31, 2023
Preferred Stock, Shares Authorized (in shares)																												25,000,000		25,000,000		25,000,000										25,000,000
Common Stock, Shares Authorized, Increase (in shares)														6,500,000
Preferred Stock, Convertible, Conversion Price (in dollars per share)																																		$ 2.19
Payments of Stock Issuance Costs																														$ 146,971	$ 373,210
Preferred Stock Dividends, Income Statement Impact																												$ 36,112	$ 47,879	155,800	158,862
Accrued Expenses Settled With Warrants																														$ 350,000	$ 0
Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures (in shares)																												78,000	0	156,615	687
Share-Based Payment Arrangement, Expense																													$ 0		$ 16,042
Share-Based Payment Arrangement, Nonvested Award, Option, Cost Not yet Recognized, Amount																												$ 0		$ 0		$ 0
Restricted Stock Units (RSUs) [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grant Date Fair Value																												362,945	131,504	362,945	131,504	362,945	$ 131,504
Share-Based Payment Arrangement, Expense																												149,979	16,675	311,690	47,749
Share-Based Payment Arrangement, Nonvested Award, Excluding Option, Cost Not yet Recognized, Amount																												$ 87,000	$ 104,809	$ 87,000	$ 104,809	$ 87,000	$ 104,809
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested and Not Released in Period (in shares)																														210
Share-Based Compensation Arrangement by Share-Based Payment Award, Non-Option Equity Instruments, Granted (in shares)																														258,730	7,981
Restricted Stock Units (RSUs) [Member] | Officer [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Non-Option Equity Instruments, Granted (in shares)																														0
Conversions of Series F Preferred Stock Into Common Stock [Member]
Conversion of Stock, Shares Converted (in shares)																												4,278	1,595	12,038	6,475
Conversion of Stock, Shares Issued (in shares)																												3,228,799	69,635	11,501,461	187,009
Conversion of Convertible Note Into Common Stock [Member]
Debt Conversion, Converted Instrument, Shares Issued (in shares)																												10,383	0	1,490,495	1,597
Debt Conversion, Original Debt, Amount																												$ 8,612	$ 0	$ 1,425,606	$ 100,000
Debt Instrument, Convertible, Average Conversion Rate (in dollars per share)																												$ 0.8294	$ 0	$ 0.9573	$ 62.6235
Series F Warrants [Member]
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share)		$ 1.8149					$ 1.1908						$ 0.8294			$ 1.2								$ 30				$ 0.8294	30	$ 0.8294	$ 30	$ 0.8294	$ 30	$ 2.19						$ 1.1			$ 20.19
Stock Issued During Period, Shares, Warrant Exercises (in shares)																												3,622,918		3,622,918	16,590
Class of Warrant or Right, Issued, Weighted Average Exercise Price (in dollars per share)	$ 1.8342	$ 1.8149	$ 1.8149	[1]	$ 1.4	$ 1.4	$ 1.1908				$ 1.2169		0.8294			$ 0.8294	[3]	$ 0.8294	[3]
Proceeds from Warrant Exercises																												$ 3,804,318		$ 3,804,318	$ 497,701
Stock Issued During Period, Shares, Cashless Warrant Exercises (in shares)																												60,000
Class of Warrant or Right, Cashless Exercise (in shares)																												142,857
Class of Warrant or Right, Exchanged (in shares)																										(142,857)	(125,362)
Class of Warrant or Right, Exchanged, Weighted Average Exercise Price (in dollars per share)																										$ 0.8294	$ 1.1
Series B Warrants [Member]
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share)													$ 0.8294																									$ 0.8294		1.9445
Stock Issued During Period, Shares, Warrant Exercises (in shares)																												7,868,924		10,089,612
Class of Warrant or Right, Issued, Weighted Average Exercise Price (in dollars per share)																												$ 0.8294
Proceeds from Warrant Exercises																												$ 6,526,485		$ 8,317,002	$ 0
Accrued Expenses Settled With Warrants																														$ 350,000
Stock Issued During Period, Shares, Warrant Exchange (in shares)															88,908
Class of Warrant or Right, Exchanged (in shares)															125,362
Class of Warrant or Right, Exchanged, Weighted Average Exercise Price (in dollars per share)															$ 1.1
Stock Issued During Period, Shares, Value, Warrant Exchange															$ 108,468
Series A Warrants [Member]
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share)																												$ 1.9445		$ 1.9445		1.9445
Stock Issued During Period, Shares, Warrant Exercises (in shares)																														63,017
Maximum [Member] | Series F Warrants [Member]
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share)																				$ 37								1.4		$ 1.4		1.4					$ 1.26				$ 5.25			$ 124.5
Maximum [Member] | Series B Warrants [Member]
Class of Warrant or Right, Issued, Exercise Price (in dollars per share)																														1.1
Minimum [Member] | Series F Warrants [Member]
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share)																				$ 23.15								$ 0.8294		0.8294		$ 0.8294					1.19				2.22			60.29
Minimum [Member] | Series B Warrants [Member]
Class of Warrant or Right, Issued, Exercise Price (in dollars per share)																														$ 0.8294
Alpha [Member] | Series F Warrants [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)	272,599	275,497	456,621		357,143	714,286	671,818	797,067	838,364	418,831			602,846			415,420		450,390		24,765	21,598	32,659	28,378	16,588
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share)	$ 1.8342	$ 1.8149	$ 2.19		$ 1.4	$ 1.4	$ 1.1908	$ 1.2546	$ 1.1928	$ 1.1938			$ 0.8294			$ 1.2036		$ 2.2203		$ 20.19	$ 23.15	$ 32.15	$ 37	$ 60.29											$ 1.1908	$ 2.19			$ 0.8294			$ 1.1
Warrants and Rights Outstanding, Term (Year)	3 years	3 years	3 years		3 years	3 years	3 years	3 years	3 years	3 years			3 years			3 years		3 years		3 years	3 years	3 years	3 years	3 years
Series F Convertible Preferred Stock [Member]
Preferred Stock, Dividend Rate, Percentage																									5.00%					5.00%
Preferred Stock, Shares Authorized (in shares)																									35,000			35,000		35,000		35,000										35,000
Preferred Stock, Stated Value Per Share (in dollars per share)																									$ 1,000			$ 1,000		$ 1,000		$ 1,000
Stock Issued During Period, Shares, New Issues (in shares)																														8,800	4,100	17,000	18,950
Proceeds from Issuance of Convertible Preferred Stock																																$ 15,500,000	$ 18,950,000
Preferred Stock, Convertible, Conversion Price (in dollars per share)		$ 1.8149					$ 1.1908						$ 0.8294			$ 1.2								$ 30				$ 0	$ 0	$ 0	$ 0	$ 0	$ 0							$ 1.1		$ 0	$ 20.19		$ 0
Preferred Stock, Convertible, Shares Issuable (in shares)																												2,143,977	183,259	2,143,977	183,259	2,143,977	183,259
Proceeds from Issuance of Convertible Preferred Stock, Net																																$ 15,425,000	$ 18,795,000
Preferred Stock Dividends, Income Statement Impact																												$ 36,111	$ 47,879	$ 155,800	$ 158,862
Dividends Payable																												$ 902,466		$ 902,466		$ 902,466										$ 746,666
Series F Convertible Preferred Stock [Member] | Maximum [Member]
Preferred Stock, Convertible, Conversion Price (in dollars per share)																				$ 37																	1.25				5.25			124.5
Series F Convertible Preferred Stock [Member] | Minimum [Member]
Preferred Stock, Convertible, Conversion Price (in dollars per share)																				$ 23.15																	$ 1.19				$ 2.22			$ 60.29
Series F Convertible Preferred Stock [Member] | Alpha [Member]
Stock Issued During Period, Shares, New Issues (in shares)	500	500	1,000		500	1,000	800	1,000	1,000	500			500			500		1,000		500	500	1,050	1,050	1,000	10,000
Proceeds from Issuance of Convertible Preferred Stock	$ 500,000	$ 500,000	$ 1,000,000		$ 500,000	$ 1,000,000	$ 800,000	$ 1,000,000	$ 1,000,000				$ 500,000			$ 500,000		$ 1,000,000
Convertible Preferred Stock, Shares Issued upon Conversion (in shares)			456,621			714,286	671,818	797,067	838,364	418,831			602,846			415,420		450,390					28,378	16,588
Preferred Stock, Convertible, Conversion Price (in dollars per share)	$ 1.8342	$ 1.8149	$ 2.19		$ 1.4	$ 1.4	$ 1.1908	$ 1.2546	$ 1.1928	$ 1.1938			$ 0.8294			$ 1.2036		$ 2.2203		$ 20.19	$ 23.15	$ 32.15	$ 37	$ 60.29
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)																						32,659
Preferred Stock, Convertible, Shares Issuable (in shares)	272,599	275,497			357,143															24,765	21,598
Proceeds from Issuance of Convertible Preferred Stock, Net																				$ 500,000	$ 500,000	$ 1,050,000	$ 1,050,000	$ 950,000
Payments of Stock Issuance Costs																								$ 50,000
Series F Convertible Preferred Stock [Member] | Alpha [Member] | Maximum [Member]
Equity Issuance, Maximum Additional Stated Value Issuable																									$ 25,000,000

[1] Reflects the exercise price after the August 2025 Down Round Trigger on August 22, 2025 as described above.

[2] Reflects the exercise price after the July 2025 Down Round Trigger on July 11, 2025 as described above.

[3] Reflects the exercise price after the May 2025 Down Round Trigger on May 5, 2025 as described above.