Note 5 - Capital Stock (Details Textual)					1 Months Ended	9 Months Ended	12 Months Ended		21 Months Ended
		Aug. 23, 2024 shares	Mar. 31, 2023 $ / shares shares	Mar. 30, 2023 $ / shares shares	Jan. 31, 2025 USD ($) $ / shares shares	Sep. 30, 2024 USD ($) $ / shares shares	Dec. 31, 2024 USD ($) $ / shares shares	Dec. 31, 2023 USD ($) $ / shares shares	Dec. 31, 2024 $ / shares 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)							1,144,926	573,644	1,144,926
Common Stock, Shares, Outstanding (in shares)							1,144,737	573,455	1,144,737
Shares Issued, Shares, Share-Based Payment Arrangement, after Forfeiture (in shares)								4,490
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)							2,272,203		2,272,203
Warrant Adjustment, Deemed Dividend | $						$ 8,974,000	$ 8,974,000	$ 0
Proceeds from Warrant Exercises | $								$ 534,000
Treasury Stock, Common, Shares (in shares)							189	189	189
Warrants Post Reverse Split [Member]
Class of Warrant or Right, Outstanding (in shares)	[1]					127,531
Series F Preferred Stock [Member]
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		$ 11.17
Preferred Stock, Convertible, Floor Price (in dollars per share) | $ / shares							$ 11.17		$ 11.17	$ 11.17
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
Conversion of Series F Preferred Stock to Common Stock [Member]
Conversion of Stock, Shares Issued (in shares)							288,968	352,624	641,592
Conversion of Stock, Shares Converted (in shares)							3,033	4,620
Common Stock Warrants [Member]
Stock Issued During Period, Shares, Warrants Exercised (in shares)							282,314	8,490
Class of Warrant or Right, Exercised (in shares)							282,314	8,490
Proceeds From Warrant Exercises, Net | $							$ 903,000	$ 534,000
Preferred Warrants [Member]
Stock Issued During Period, Shares, Warrants Exercised (in shares)							1,648
Class of Warrant or Right, Exercised (in shares)							1,648
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%
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares							$ 975		$ 975
Warrants and Rights Outstanding, Term (Year)							3 years		3 years
Class of Warrant or Right, Exercise Price of Warrants or Rights Exercised (in dollars per share) | $ / shares							$ 975
Class of Warrant or Right, Outstanding (in shares)							31,102		31,102
Proceeds from Warrant Exercises | $							$ 1,607,000
Proceeds From Warrant Exercises, Net | $							1,478,000	$ 5,364,000
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
Class of Warrant or Right, Cash Fee, Percentage of Proceeds				8.00%
Preferred Stock, Convertible, Conversion Price (in dollars per share) | $ / shares			$ 68.4
Class of Warrant or Right, Beneficial Ownership Percentage			4.99%
Class of Warrant or Right, Outstanding (in shares)		153,470
Warrant Adjustment, Deemed Dividend | $						$ 539,000
Placement Agent Warrants [Member] | Warrants Post Reverse Split [Member]
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares						$ 68.4
Class of Warrant or Right, Outstanding (in shares)	[1]					7,663
Common Warrants [Member]
Class of Warrant or Right, Exercised (in shares)							282,314	18,681
Class of Warrant or Right, Cash Fee, Percentage of Proceeds							8.00%
Class of Warrant or Right, Issued (in shares)							24,104	113,597
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares							$ 3.41	$ 69.03	$ 3.41		$ 2,653.8
Warrants and Rights Outstanding, Term (Year)							5 years		5 years
Class of Warrant or Right, Exercise Price of Warrants or Rights Exercised (in dollars per share) | $ / shares							$ 3.41	$ 31.18
Class of Warrant or Right, Outstanding (in shares)		2,401,047					2,272,203	103,453	2,272,203		8,609
Proceeds from Warrant Exercises | $							$ 964,000
Proceeds From Warrant Exercises, Net | $							903,000
Class of Warrant or Right, Cash Fee | $							$ 77,000
Common Warrants [Member] | Subsequent Event [Member]
Stock Issued During Period, Shares, Warrants Exercised (in shares)					10,000
Class of Warrant or Right, Exercised (in shares)					10,000
Class of Warrant or Right, Exercise Price of Warrants or Rights Exercised (in dollars per share) | $ / shares					$ 3.41
Proceeds from Warrant Exercises | $					$ 34,000
Proceeds From Warrant Exercises, Net | $					$ 31,000
Common Warrants [Member] | Warrants Post Reverse Split [Member]
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares							$ 68.4		$ 68.4
Reverse Stock Split [Member]
Stockholders' Equity Note, Stock Split, Conversion Ratio		40

[1] Adjusted by the Reverse Split.