Note 6 - Warrants - Assumptions Used to Determine Fair Value of Warrants (Details)	Sep. 30, 2025	Dec. 31, 2024
Measurement Input, Risk Free Interest Rate [Member]
Warrant assumptions	0
Measurement Input, Risk Free Interest Rate [Member] | Minimum [Member]
Warrant assumptions		0.0369
Measurement Input, Risk Free Interest Rate [Member] | Maximum [Member]
Warrant assumptions		0.0538
Measurement Input, Price Volatility [Member]
Warrant assumptions	0
Measurement Input, Price Volatility [Member] | Minimum [Member]
Warrant assumptions		0.64
Measurement Input, Price Volatility [Member] | Maximum [Member]
Warrant assumptions		0.95
Measurement Input, Expected Dividend Rate [Member]
Warrant assumptions	0	0
Measurement Input, Forfeiture Rate [Member]
Warrant assumptions	0	0
Measurement Input, Expected Term [Member]
Warrant assumptions	0