Note 4 - Capital Stock (Details Textual)				1 Months Ended	3 Months Ended					9 Months Ended		12 Months Ended	18 Months Ended
	Aug. 23, 2024 $ / shares shares	Mar. 31, 2023 $ / shares shares	Mar. 30, 2023 $ / shares shares	Nov. 06, 2024 USD ($) $ / shares shares	Sep. 30, 2024 USD ($) $ / shares shares	Mar. 31, 2024 shares	Sep. 30, 2023 USD ($) $ / shares shares	Jun. 30, 2023 shares	Mar. 31, 2023 $ / shares shares	Sep. 30, 2024 USD ($) $ / shares shares	Sep. 30, 2023 USD ($) $ / shares shares	Dec. 31, 2023 $ / shares shares	Jun. 30, 2024 shares	Oct. 06, 2023 $ / shares	Dec. 31, 2022 $ / shares shares
Common Stock, Par or Stated Value Per Share (in dollars per share) | $ / shares					$ 0.0001					$ 0.0001		$ 0.0001
Common Stock, Shares Authorized (in shares)					150,000,000					150,000,000		150,000,000
Common Stock, Shares, Issued (in shares)					1,071,545					1,071,545		573,644
Common Stock, Shares, Outstanding (in shares)					1,071,356					1,071,356		573,455
Stock Issued During Period, Shares, Warrants Exercised (in shares)											8,516
Preferred Stock, Par or Stated Value Per Share (in dollars per share) | $ / shares					$ 0.0001					$ 0.0001		$ 0.0001
Class of Warrant or Right, Outstanding (in shares)					2,345,603					2,345,603
Warrant Adjustment, Deemed Dividend | $					$ 8,974,000		$ 0			$ 8,974,000	$ 0
Series F Preferred Stock [Member]
Stock Issued During Period, Shares, Warrants Exercised (in shares)					1,648
Conversion of Stock, Shares Converted (in shares)										3,033		4,620
Stock Issued During Period, Shares, New Issues (in shares)		6,550								1,648
Preferred Stock, Convertible, Conversion Price (in dollars per share) | $ / shares			$ 68.4		$ 11.17		$ 68.4			$ 11.17	$ 68.4
Preferred Stock, Convertible, Floor Price (in dollars per share) | $ / shares					$ 11.168					$ 11.168				$ 11.168
Private Placement [Member] | Series F Preferred Stock [Member]
Stock Issued During Period, Shares, New Issues (in shares)			6,550
Preferred Stock, Par or Stated Value Per Share (in dollars per share) | $ / shares			$ 0.0001
Common Stock [Member]
Common Stock, Shares, Outstanding (in shares)					1,071,356,000					1,071,356,000
Stock Issued During Period, Shares, Warrants Exercised (in shares)					208,933			8,516				18,681,000
Stock Issued During Period, Shares, Common Warrants Exercised (in shares)										208,933,000
Shares Issued, Shares, Share-Based Payment Arrangement, after Forfeiture (in shares)						0		4,491			4,491	4,491,000
Stock Issued During Period, Shares, New Issues (in shares)									0
Conversion of Series F Preferred Stock to Common Stock [Member]
Conversion of Stock, Shares Issued (in shares)							49,143			288,968	52,812	352,624	641,592
Conversion of Stock, Shares Converted (in shares)							1,229			3,033	1,404
Common Warrants [Member]
Stock Issued During Period, Shares, Warrants Exercised (in shares)					208,933
Class of Warrant or Right, Exercised (in shares)					208,933					208,933	8,516	18,681
Stock Issued During Period, Shares, Common Warrants Exercised (in shares)					208,933
Class of Warrant or Right, Cash Fee, Percentage of Proceeds					8.00%
Class of Warrant or Right, Issued (in shares)										24,104		113,597
Warrants and Rights Outstanding, Term (Year)					5 years					5 years
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares	$ 3.41438				$ 3.44					$ 3.44		$ 69.03			$ 2,653.6
Class of Warrant or Right, Outstanding (in shares)	2,401,047				2,345,603					2,345,603		103,453			8,609
Class of Warrant or Right, Exercise Price of Warrants or Rights Exercised (in dollars per share) | $ / shares					$ 3.41438					$ 3.41		$ 31.18
Proceeds from Warrant Exercises | $					$ 713,000
Proceeds From Warrant Exercises, Net | $					671,000
Class of Warrant or Right, Cash Fee | $					$ 57,000
Common Warrants [Member] | Subsequent Event [Member]
Stock Issued During Period, Shares, Warrants Exercised (in shares)				73,381
Class of Warrant or Right, Exercised (in shares)				73,381
Class of Warrant or Right, Exercise Price of Warrants or Rights Exercised (in dollars per share) | $ / shares				$ 3.41438
Proceeds from Warrant Exercises | $				$ 251,000
Proceeds From Warrant Exercises, Net | $				$ 231,000
Preferred Warrants [Member]
Stock Issued During Period, Shares, Warrants Exercised (in shares)										1,648
Class of Warrant or Right, Exercised (in shares)					1,648					1,648
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)			32,750
Class of Warrant or Right, Cash Fee, Percentage of Proceeds										8.00%
Warrants and Rights Outstanding, Term (Year)					3 years					3 years
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares					$ 975					$ 975
Class of Warrant or Right, Outstanding (in shares)					31,102					31,102
Class of Warrant or Right, Exercise Price of Warrants or Rights Exercised (in dollars per share) | $ / shares										$ 975
Proceeds from Warrant Exercises | $										$ 1,607,000
Proceeds From Warrant Exercises, Net | $										1,478,000	$ 0
Class of Warrant or Right, Cash Fee | $										129,000
Investor Warrants [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)			95,764
Placement Agent Warrants [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)		103,427	7,663						103,427
Class of Warrant or Right, Cash Fee, Percentage of Proceeds			8.00%
Preferred Stock, Convertible, Conversion Price (in dollars per share) | $ / shares		$ 68.4							$ 68.4
Class of Warrant or Right, Beneficial Ownership Percentage		4.99%							4.99%
Class of Warrant or Right, Outstanding (in shares)	153,470
Warrant Adjustment, Deemed Dividend | $										$ 539,000
Reverse Stock Split [Member]
Stockholders' Equity Note, Stock Split, Conversion Ratio	40