Note 7 - Fair Value of Financial Instruments - Derivative Liability Valuation Assumptions (Details) - Embedded Derivative Financial Instruments [Member]	Jun. 30, 2026	Dec. 31, 2025
Measurement Input, Expected Term [Member] \| Minimum [Member]
Embedded derivative, measurement input	0.5	0.91
Measurement Input, Expected Term [Member] \| Maximum [Member]
Embedded derivative, measurement input	1.58	1.5
Measurement Input, Price Volatility [Member]
Embedded derivative, measurement input	1.329
Measurement Input, Price Volatility [Member] \| Minimum [Member]
Embedded derivative, measurement input		1.056
Measurement Input, Price Volatility [Member] \| Maximum [Member]
Embedded derivative, measurement input		1.239
Measurement Input, Risk Free Interest Rate [Member] \| Minimum [Member]
Embedded derivative, measurement input	0.039	0.0345
Measurement Input, Risk Free Interest Rate [Member] \| Maximum [Member]
Embedded derivative, measurement input	0.0399	0.0365
Measurement Input, Continuous Discount Rate [Member] \| Minimum [Member]
Embedded derivative, measurement input	0.2117	0.1421
Measurement Input, Continuous Discount Rate [Member] \| Maximum [Member]
Embedded derivative, measurement input	0.2192	0.1685
Measurement Input, Discount Factor [Member] \| Minimum [Member]
Embedded derivative, measurement input	0.72	0.81
Measurement Input, Discount Factor [Member] \| Maximum [Member]
Embedded derivative, measurement input	0.98	0.96