Note 2 - Fair Value Measurements - Summary of Fair Value Measurement Inputs and Valuation Techniques (Details)	Sep. 30, 2025	Jul. 28, 2025
Measurement Input, Expected Term [Member] | Valuation Technique, Binomial Pricing Model [Member] | The 2025 Note [Member]
Debt, measurement input	4.9
Measurement Input, Price Volatility [Member] | Valuation Technique, Binomial Pricing Model [Member] | The 2025 Note [Member]
Debt, measurement input	1.43
Measurement Input, Risk Free Interest Rate [Member] | Valuation Technique, Binomial Pricing Model [Member] | The 2025 Note [Member]
Debt, measurement input	0.037
Measurement Input, Expected Dividend Rate [Member] | Valuation Technique, Binomial Pricing Model [Member] | The 2025 Note [Member]
Debt, measurement input	0
Measurement Input, Exercise Price [Member] | Valuation Technique, Binomial Pricing Model [Member] | The 2025 Note [Member]
Debt, measurement input	2.22
Warrant Liability [Member] | Measurement Input, Expected Term [Member] | Valuation Technique, Black-Scholes-Merton Model [Member]
Derivative Liability, Measurement Input		3.9
Warrant Liability [Member] | Measurement Input, Price Volatility [Member] | Valuation Technique, Black-Scholes-Merton Model [Member]
Derivative Liability, Measurement Input		1.443
Warrant Liability [Member] | Measurement Input, Risk Free Interest Rate [Member] | Valuation Technique, Black-Scholes-Merton Model [Member]
Derivative Liability, Measurement Input		0.039
Warrant Liability [Member] | Measurement Input, Expected Dividend Rate [Member] | Valuation Technique, Black-Scholes-Merton Model [Member]
Derivative Liability, Measurement Input		0
Warrant Liability [Member] | Measurement Input, Exercise Price [Member] | Valuation Technique, Black-Scholes-Merton Model [Member]
Derivative Liability, Measurement Input		2.22