Note 7 - Warrants (Details Textual) - $ / shares	Mar. 13, 2026	Mar. 31, 2026	Dec. 31, 2025
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share)			$ 0.72
Class of Warrant or Right, Outstanding		45,718,344	39,319,028
Class of Warrants or Right, Exercisable		45,718,344
April 2025 Prefunded Warrants [Member]
Class of Warrant or Right, Issued During Period, Price Per Warrant	$ 0.585
Class of Warrant or Right, Number of Securities Called by Warrants or Rights	6,399,316
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share)	$ 0.001	$ 0.001
Pre-funded Warrants [Member]
Class of Warrant or Right, Issued During Period, Price Per Warrant	$ 0.585
Class of Warrant or Right, Number of Securities Called by Warrants or Rights	6,399,316
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share)	$ 0.001
Class of Warrant or Right, Outstanding		25,452,768
Prefund Warrants [Member]
Class of Warrants or Right, Exercisable		25,452,768