Note 6 - Debt and Warrants Transactions - Warrant Valuation Assumptions (Details)	Dec. 31, 2025	Nov. 05, 2025	Sep. 30, 2025	Dec. 31, 2024
Measurement Input, Share Price [Member]
Warrants and Rights Outstanding, Measurement Input		0.66	0.73
Measurement Input, Risk Free Interest Rate [Member]
Warrants and Rights Outstanding, Measurement Input		0.038	0.036
Measurement Input, Expected Term [Member]
Warrants and Rights Outstanding, Measurement Input		4.7	4.85
Measurement Input, Price Volatility [Member]
Warrants and Rights Outstanding, Measurement Input		0.936	0.907
Notes Warrants [Member] | Measurement Input, Share Price [Member]
Warrants and Rights Outstanding, Measurement Input	0.54			1.31
Notes Warrants [Member] | Measurement Input, Risk Free Interest Rate [Member]
Warrants and Rights Outstanding, Measurement Input	0.035			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	1.61			2.61
Notes Warrants [Member] | Measurement Input, Price Volatility [Member]
Warrants and Rights Outstanding, Measurement Input	1.199			1.059
Additional Warrants [Member] | Measurement Input, Share Price [Member]
Warrants and Rights Outstanding, Measurement Input	0.54			1.31
Additional Warrants [Member] | Measurement Input, Risk Free Interest Rate [Member]
Warrants and Rights Outstanding, Measurement Input	0.035			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	2.12			3.12
Additional Warrants [Member] | Measurement Input, Price Volatility [Member]
Warrants and Rights Outstanding, Measurement Input	1.16			0.996