Note 5 - Debt and Warrants Transactions - Warrant Valuation Assumptions (Details)	Mar. 31, 2026	Dec. 31, 2025	Nov. 05, 2025	Sep. 30, 2025
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			0.94	0.907
Notes Warrants [Member] | Measurement Input, Share Price [Member]
Warrants and Rights Outstanding, Measurement Input	0.72	0.54
Notes Warrants [Member] | Measurement Input, Risk Free Interest Rate [Member]
Warrants and Rights Outstanding, Measurement Input	0.037	0.035
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	1.36	1.61
Notes Warrants [Member] | Measurement Input, Price Volatility [Member]
Warrants and Rights Outstanding, Measurement Input	0.987	1.199
Additional Warrants [Member] | Measurement Input, Share Price [Member]
Warrants and Rights Outstanding, Measurement Input	0.72	0.54
Additional Warrants [Member] | Measurement Input, Risk Free Interest Rate [Member]
Warrants and Rights Outstanding, Measurement Input	0.037	0.035
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	1.87	2.12
Additional Warrants [Member] | Measurement Input, Price Volatility [Member]
Warrants and Rights Outstanding, Measurement Input	1.161	1.16