Note 11 - Subsequent Events (Details Textual) - USD ($)																									1 Months Ended		3 Months Ended		9 Months Ended		23 Months Ended	27 Months Ended
	Nov. 30, 2025	Nov. 14, 2025	Nov. 10, 2025	Nov. 05, 2025	Oct. 06, 2025	Oct. 03, 2025	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	May 05, 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	Nov. 14, 2025	Nov. 10, 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	May 31, 2025	May 04, 2025	Dec. 31, 2024	Oct. 03, 2024	Aug. 27, 2024	Feb. 08, 2024	Dec. 31, 2023
Preferred Stock, Convertible, Conversion Price (in dollars per share)																																	$ 2.19
Preferred Stock, Shares Authorized (in shares)																											25,000,000		25,000,000		25,000,000							25,000,000
Preferred Stock, Par or Stated Value Per Share (in dollars per share)																											$ 0.001		$ 0.001		$ 0.001							$ 0.001
Common Stock, Par or Stated Value Per Share (in dollars per share)																											$ 0.001		$ 0.001		0.001							0.001	$ 0.001		$ 0.001
Conversions of Series F Preferred Stock Into Common Stock [Member]
Conversion of Stock, Shares Issued (in shares)																											3,228,799	69,635	11,501,461	187,009
Conversion of Stock, Shares Converted (in shares)																											4,278	1,595	12,038	6,475
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
Subsequent Event [Member]
Common Stock, Par or Stated Value Per Share (in dollars per share)				$ 0.001
Subsequent Event [Member] | Conversions of Series F Preferred Stock Into Common Stock [Member]
Preferred Stock, Convertible, Conversion Price (in dollars per share)		$ 2.0679	$ 1.23																						$ 2.0679	$ 1.23
Preferred Stock, Stated Value Per Share (in dollars per share)			1,000																							$ 1,000
Conversion of Stock, Shares Issued (in shares)																										1,117,574
Conversion of Stock, Shares Converted (in shares)																										2,185
Subsequent Event [Member] | Conversions of Series G Preferred Stock Into Common Stock [Member]
Preferred Stock, Convertible, Conversion Price (in dollars per share)			$ 1.23																							$ 1.23
Conversion of Stock, Shares Issued (in shares)																										1,920,324
Conversion of Stock, Shares Converted (in shares)																										2,362
Subsequent Event [Member] | Common Stock Purchase Warrants [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)		300,000																							300,000
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share)		$ 1.4																							$ 1.4
Proceeds from Issuance or Sale of Equity																									$ 420,000
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
Alpha [Member] | Subsequent Event [Member]
Proceeds from Issuance or Sale of Equity					$ 1,000,000	$ 200,000
Alpha [Member] | Subsequent Event [Member] | Series F Warrants [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)					426,857	967,165
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share)					$ 2.3427	$ 2.0679
Series F Convertible Preferred Stock [Member]
Stock Issued During Period, Shares, New Issues (in shares)																													8,800	4,100	17,000	18,950
Preferred Stock, Convertible, Shares Issuable (in shares)																											2,143,977	183,259	2,143,977	183,259	2,143,977	183,259
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, Stated Value Per Share (in dollars per share)																								$ 1,000			$ 1,000		$ 1,000		$ 1,000
Preferred Stock, Shares Authorized (in shares)																								35,000			35,000		35,000		35,000							35,000
Preferred Stock, Par or Stated Value Per Share (in dollars per share)																											$ 0.001		$ 0.001		$ 0.001							$ 0.001
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
Preferred Stock, Convertible, Shares Issuable (in shares)							272,599	275,497		357,143									24,765	21,598
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
Series F Convertible Preferred Stock [Member] | Alpha [Member] | Subsequent Event [Member]
Stock Issued During Period, Shares, New Issues (in shares)					1,000	2,000
Preferred Stock, Convertible, Shares Issuable (in shares)					426,857	967,165
Preferred Stock, Convertible, Conversion Price (in dollars per share)					$ 2.3427	$ 2.0679
Series G Preferred Stock [Member] | Subsequent Event [Member]
Preferred Stock, Par or Stated Value Per Share (in dollars per share)				$ 0.001
Series G Preferred Stock [Member] | Subsequent Event [Member] | Series G Certificate of Designation [Member]
Preferred Stock, Stated Value Per Share (in dollars per share)	$ 1,000	$ 1,000																							$ 1,000
Preferred Stock, Conversion Price Limitation by Minimum Price, Percentage		25.00%
Preferred Stock, Minimum Conversion Price (in dollars per share)		$ 1
Series G Preferred Stock [Member] | Subsequent Event [Member] | Series G Securities Purchase Agreement [Member]
Stock Issued During Period, Shares, New Issues (in shares)	12,000		12,000	12,000
Proceeds from Issuance or Sale of Equity	$ 11,500,000			$ 12,000,000
Preferred Stock, Shares Authorized (in shares)	100,000			100,000
Preferred Stock, Issuable Upon Conversion, Percentage Of Common Stock Issued And Outstanding Benchmark				19.99%
Additional Shares Issuable (in shares)				88,000
Proceeds from Issuance or Sale of Equity, Net			$ 11,500,000
Payment of Financing and Stock Issuance Costs			$ 500,000