Note 9 - Subsequent Events (Details Textual) - USD ($)						1 Months Ended		3 Months Ended
	May 19, 2026	May 19, 2026	May 07, 2026	Mar. 31, 2026	Mar. 11, 2026	May 31, 2026	Apr. 30, 2026	Mar. 31, 2026	Mar. 31, 2025
Stock Issued During Period, Shares, Warrant Exercise (in shares)					3,433
Proceeds from Warrant Exercises					$ 4,800			$ 4,841	$ 0
Existing Stock Purchase Warrants [Member] | Certain Existing Warrant Holders [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)				1,269,316				1,269,316
Class of Warrant or Right, Exercised (in shares)				634,658
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share)				$ 1.36				$ 1.36
Subsequent Event [Member]
Stock Issued During Period, Shares, Warrant Exercise (in shares)						59,546
Proceeds from Warrant Exercises						$ 70,723
Subsequent Event [Member] | Existing Stock Purchase Warrants [Member] | Certain Existing Warrant Holders [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)			851,493
Class of Warrant or Right, Exercised (in shares)		20,000	501,144
Subsequent Event [Member] | New Warrants from Inducement Letter [Member] | Certain Existing Warrant Holders [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)			1,002,288
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share)			$ 1.65
Warrant Exercise Inducement Letters [Member]
Stock Issued During Period, Shares, New Issues (in shares)				560,658
Warrant Exercise Inducement Letters [Member] | Subsequent Event [Member]
Stock Issued During Period, Shares, New Issues (in shares)							74,000
Proceeds from Issuance or Sale of Equity	$ 535,600