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Note 7 - Stockholders' Equity (Details Textual)					3 Months Ended
	Dec. 02, 2024 USD ($)	May 30, 2024 shares	Feb. 09, 2024 USD ($) $ / shares shares	Dec. 06, 2023 USD ($)	Mar. 31, 2025 USD ($) $ / shares shares	Mar. 31, 2024 USD ($) shares	Dec. 31, 2024 $ / shares shares
Common Stock, Shares Authorized (in shares) | shares		100,000,000			50,000,000		50,000,000
Class of Warrant or Right, Exercise Price of Warrants or Rights | $ / shares					$ 3.1		$ 3.1
Payments of Stock Issuance Costs					$ 16,000	$ 90,000
Proceeds from Issuance of Common Stock					212,000	$ 1,466,000
Warrants To Purchase Common Stock [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights | shares			67,104
Class of Warrant or Right, Exercise Price of Warrants or Rights | $ / shares			$ 6.6
February 2024 Financing [Member]
Stock Issued During Period, Shares, New Issues | shares			134,199
Proceeds from Issuance or Sale of Equity			$ 875,000
Payments of Stock Issuance Costs			$ 43,000
Sales Agreement With H.C. Wainwright & Co., LLC [Member]
Sale of Stock, Aggregate Value, Maximum	$ 1,300,000			$ 2,750,000
Accrued Sales Commission, Current, Percentage				3.00%
Sale of Stock, Available Value					$ 1,100,000
Sales Agreement with Cantor Fitzgerald Co (Cantor) [Member]
Stock Issued During Period, Shares, New Issues | shares					81,274	77,127
Payments of Stock Issuance Costs					$ 27,000	$ 32,000
Proceeds from Issuance of Common Stock					$ 212,000,000,000	$ 591,000
Reverse Stock Split [Member]
Stockholders' Equity Note, Stock Split, Conversion Ratio		15

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