Note 5 - Debt and Warrants Transactions - Warrant Valuation Assumptions (Details)	Sep. 30, 2025	Dec. 31, 2024
Measurement Input, Share Price [Member]
Warrants and Rights Outstanding, Measurement Input	0.73
Measurement Input, Risk Free Interest Rate [Member]
Warrants and Rights Outstanding, Measurement Input	0.036
Measurement Input, Expected Term [Member]
Warrants and Rights Outstanding, Measurement Input	4.85
Measurement Input, Price Volatility [Member]
Warrants and Rights Outstanding, Measurement Input	0.9066
Notes Warrants [Member] | Measurement Input, Share Price [Member]
Warrants and Rights Outstanding, Measurement Input	0.72	1.31
Notes Warrants [Member] | Measurement Input, Risk Free Interest Rate [Member]
Warrants and Rights Outstanding, Measurement Input	0.036	0.042
Notes Warrants [Member] | Measurement Input, Expected Dividend Rate [Member]
Warrants and Rights Outstanding, Measurement Input	0	0
Notes Warrants [Member] | Measurement Input, Expected Term [Member]
Warrants and Rights Outstanding, Measurement Input	1.86	2.61
Notes Warrants [Member] | Measurement Input, Price Volatility [Member]
Warrants and Rights Outstanding, Measurement Input	1.217	1.059
Additional Warrants [Member] | Measurement Input, Share Price [Member]
Warrants and Rights Outstanding, Measurement Input	0.72	1.31
Additional Warrants [Member] | Measurement Input, Risk Free Interest Rate [Member]
Warrants and Rights Outstanding, Measurement Input	0.036	0.043
Additional Warrants [Member] | Measurement Input, Expected Dividend Rate [Member]
Warrants and Rights Outstanding, Measurement Input	0	0
Additional Warrants [Member] | Measurement Input, Expected Term [Member]
Warrants and Rights Outstanding, Measurement Input	2.37	3.12
Additional Warrants [Member] | Measurement Input, Price Volatility [Member]
Warrants and Rights Outstanding, Measurement Input	1.157	0.996