Note 6 - Warrants - Assumptions Used to Determine Fair Value of Warrants (Details)	Dec. 31, 2023	Dec. 31, 2022
Measurement Input, Price Volatility [Member]
Risk free interest rate	0.49	0.40
Minimum [Member] | Measurement Input, Risk Free Interest Rate [Member]
Risk free interest rate	0.0338	0.0369
Maximum [Member] | Measurement Input, Risk Free Interest Rate [Member]
Risk free interest rate	0.0445	0.0388