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Note 4 - Warrants and Equity - Assumptions Used (Details)	Sep. 30, 2025
Measurement Input, Expected Dividend Rate [Member]
Warrants, assumptions	0
Minimum [Member] \| Measurement Input, Risk Free Interest Rate [Member]
Warrants, assumptions	0.037
Minimum [Member] \| Measurement Input, Price Volatility [Member]
Warrants, assumptions	1.111
Minimum [Member] \| Measurement Input, Expected Term [Member]
Warrants, assumptions	4.9
Maximum [Member] \| Measurement Input, Risk Free Interest Rate [Member]
Warrants, assumptions	0.037
Maximum [Member] \| Measurement Input, Price Volatility [Member]
Warrants, assumptions	1.127
Maximum [Member] \| Measurement Input, Expected Term [Member]
Warrants, assumptions	5