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Face amount or stated value per share of common stock.

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The cash outflow for cost incurred directly with the issuance of an equity security.

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Note 7 - Stockholders' Equity (Details Textual)										6 Months Ended
Note 7 - Stockholders' Equity (Details Textual)	Jun. 30, 2025 USD ($) $ / shares shares	Apr. 22, 2025 USD ($) $ / shares shares	Dec. 02, 2024 USD ($)	Sep. 03, 2024 USD ($) $ / shares shares	Aug. 29, 2024 $ / shares shares	May 30, 2024 shares	Apr. 04, 2024 USD ($)	Feb. 09, 2024 USD ($) $ / shares shares	Dec. 06, 2023 USD ($)	Jun. 30, 2025 USD ($) $ / shares shares	Jun. 30, 2024 USD ($)	Dec. 31, 2024 $ / shares shares	May 29, 2024 shares
Common Stock, Shares Authorized (in shares) \| shares	50,000,000					50,000,000				50,000,000		50,000,000	100,000,000
Class of Warrant or Right, Exercise Price of Warrants or Rights \| $ / shares	$ 2.84									$ 2.84		$ 3.1
Payments of Stock Issuance Costs \| $										$ 30,000	$ 152,000
Common Stock, Par or Stated Value Per Share (in dollars per share) \| $ / shares	$ 0.001									$ 0.001		$ 0.001
Warrants To Purchase Common Stock [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights \| shares	274,696	406,818						67,104		274,696
Class of Warrant or Right, Exercise Price of Warrants or Rights \| $ / shares	$ 1.95	$ 1.905						$ 6.6		$ 1.95
Common Warrants With Stock [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights \| shares				2,400,000	1,377,990
Class of Warrant or Right, Exercise Price of Warrants or Rights \| $ / shares				$ 3	$ 3
Common Warrants Issued With Warrants [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights \| shares					1,022,010
Prefunded Warrants [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights \| shares					1,022,010
Class of Warrant or Right, Exercise Price of Warrants or Rights \| $ / shares					$ 2.999
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
Common Stock In 2024 Agreement [Member]
Stock Issued During Period, Shares, New Issues \| shares					1,377,990
Common Stock, Par or Stated Value Per Share (in dollars per share) \| $ / shares					$ 0.001
September 2024 Financing [Member]
Proceeds from Issuance or Sale of Equity \| $				$ 7,200,000
Payments of Stock Issuance Costs \| $				$ 92,600
September 2024 Financing [Member] \| Company Directors and Executive Officers [Member]
Stock Issued During Period, Shares, New Issues \| shares					211,000
Common Warrants With Stock [Member]
Stock Issued During Period, Shares, New Issues \| shares				2,400,000
April 2025 Financing [Member]
Stock Issued During Period, Shares, New Issues \| shares		406,818
Proceeds from Issuance or Sale of Equity \| $		$ 775,000
Payments of Stock Issuance Costs \| $		$ 56,000
June 2025 Financing [Member]
Stock Issued During Period, Shares, New Issues \| shares	274,696
Proceeds from Issuance or Sale of Equity \| $	$ 570,000
Payments of Stock Issuance Costs \| $	9,000
Sales Agreement With H.C. Wainwright & Co., LLC [Member]
Sale of Stock, Aggregate Value, Maximum \| $			$ 1,300,000				$ 1,800,000		$ 2,750,000
Accrued Sales Commission, Current, Percentage									3.00%
Sale of Stock, Available Value \| $	$ 1,500,000									$ 1,500,000
Reverse Stock Split [Member]
Stockholders' Equity Note, Stock Split, Conversion Ratio						15