Note 3 - Fair Value of Financial Instruments - Valuation Measurements (Details)	Jun. 30, 2026
Measurement Input, Discount Rate [Member] \| Senior Secured Note [Member] \| Minimum [Member]
Significant Unobservable Inputs, debt	0.25
Measurement Input, Discount Rate [Member] \| Senior Secured Note [Member] \| Maximum [Member]
Significant Unobservable Inputs	0.265
Measurement Input, Expected Term [Member] \| Minimum [Member] \| Warrant Liability [Member]
Significant Unobservable Inputs	4.85
Measurement Input, Expected Term [Member] \| Maximum [Member] \| Warrant Liability [Member]
Significant Unobservable Inputs	5
Measurement Input, Expected Term [Member] \| Senior Secured Note [Member] \| Minimum [Member]
Significant Unobservable Inputs, debt	2.49
Measurement Input, Expected Term [Member] \| Senior Secured Note [Member] \| Maximum [Member]
Significant Unobservable Inputs	3
Measurement Input, Calibration Discount [Member] \| Senior Secured Note [Member]
Significant Unobservable Inputs	0.615
Measurement Input, No Exercise Window [Member] \| Minimum [Member] \| Warrant Liability [Member]
Significant Unobservable Inputs	0.19
Measurement Input, No Exercise Window [Member] \| Maximum [Member] \| Warrant Liability [Member]
Significant Unobservable Inputs	0.21