Note 5 - Fair Value Measurements - Summary of Significant Inputs in Valuation Assumption (Details)	Sep. 30, 2025	Jun. 02, 2025	Dec. 31, 2024
Measurement Input, Share Price [Member] | Minimum [Member]
Derivative Liability, Measurement Input			0.32
Measurement Input, Share Price [Member] | Maximum [Member]
Derivative Liability, Measurement Input			0.35
Measurement Input, Share Price [Member] | Common Stock Warrant Liability [Member]
Warrants and Rights Outstanding, Measurement Input	0.07		0.35
Measurement Input, Exercise Price [Member] | Common Stock Warrant Liability [Member]
Warrants and Rights Outstanding, Measurement Input	0.3		1.28
Measurement Input, Price Volatility [Member] | Minimum [Member]
Derivative Liability, Measurement Input			2.402
Measurement Input, Price Volatility [Member] | Maximum [Member]
Derivative Liability, Measurement Input			2.52
Measurement Input, Price Volatility [Member] | Common Stock Warrant Liability [Member]
Warrants and Rights Outstanding, Measurement Input	1.616
Measurement Input, Risk Free Interest Rate [Member]
Derivative Liability, Measurement Input			0.042
Measurement Input, Risk Free Interest Rate [Member] | Common Stock Warrant Liability [Member]
Warrants and Rights Outstanding, Measurement Input	0.037		0.044
Measurement Input, Conversion Price [Member]
Derivative Liability, Measurement Input			0.20
Measurement Input, Expected Term [Member] | Common Stock Warrant Liability [Member]
Warrants and Rights Outstanding, Measurement Input	4.3		5.1
Measurement Input, Discounting Period Term [Member]
Derivative Liability, Measurement Input			0.5
Measurement Input, Discounting Factor [Member]
Derivative Liability, Measurement Input			0.96
Measurement Input, Discounting Factor [Member] | Common Stock Warrant Liability [Member]
Warrants and Rights Outstanding, Measurement Input			0.81
Measurement Input, Discount Rate [Member]
Derivative Liability, Measurement Input			0.091
Convertible Notes [Member] | Measurement Input, Share Price [Member]
Debt instrument, measurement input	0.07	0.59
Convertible Notes [Member] | Measurement Input, Exercise Price [Member]
Debt instrument, measurement input	0.59	0.59
Convertible Notes [Member] | Measurement Input, Price Volatility [Member]
Debt instrument, measurement input	2.444	1.988
Convertible Notes [Member] | Measurement Input, Risk Free Interest Rate [Member]
Debt instrument, measurement input	0.038	0.041
Convertible Notes [Member] | Measurement Input, Expected Term [Member]
Debt instrument, measurement input	0.9	1
Convertible Notes [Member] | Measurement Input, Discounting Factor [Member]
Debt instrument, measurement input	0.899	0.842