Note 5 - Stockholders' Equity (Details Textual)					1 Months Ended	3 Months Ended
	Mar. 31, 2026 USD ($) $ / shares shares	Mar. 11, 2026 USD ($) shares	Feb. 17, 2026 USD ($) $ / shares shares	Jan. 09, 2026 shares	Jan. 31, 2026 USD ($) shares	Mar. 31, 2026 USD ($) $ / shares shares	Mar. 31, 2025 USD ($)
Stock Issued During Period, Shares, Stock Splits (in shares)				65,548
Stock Issued During Period, Shares, Warrant Exercise (in shares)		3,433
Proceeds from Warrant Exercises | $		$ 4,800				$ 4,841	$ 0
February 2026 Offering Warrants [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)			865,804
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares			$ 2.31
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, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares	$ 1.36					$ 1.36
Class of Warrant or Right, Exercised (in shares)	634,658
Class of Warrant or Right, Exercised, Weighted Average Exercise Price (in dollars per share) | $ / shares	$ 1.36
Existing Stock Purchase Warrants [Member] | Certain Existing Warrant Holders [Member] | Minimum [Member]
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares	1.4103					1.4103
Existing Stock Purchase Warrants [Member] | Certain Existing Warrant Holders [Member] | Maximum [Member]
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares	$ 32.75					$ 32.75
February 2026 Offering [Member]
Stock Issued During Period, Shares, New Issues (in shares)			432,902
Proceeds from Issuance or Sale of Equity | $			$ 885,000
Warrant Exercise Inducement Letters [Member]
Stock Issued During Period, Shares, New Issues (in shares)	560,658
Common Stock, Capital Shares Reserved for Future Issuance (in shares)	74,000					74,000
Proceeds from (Repurchase of) Equity | $	$ 762,700
At-the-Market Program [Member]
Stock Issued During Period, Shares, New Issues (in shares)					23,882
Proceeds from Issuance of Common Stock | $					$ 71,200
Reverse Stock Split [Member]
Stockholders' Equity Note, Stock Split, Conversion Ratio				25