Note 4 - Fair Value Measurements - Summary of Fair Value Assumptions (Details)	Sep. 30, 2025
Measurement Input, Risk Free Interest Rate [Member] \| Private Placement Warrants [Member]
Risk-free rate	0.0378
Measurement Input, Share Price [Member] \| Private Placement Warrants [Member]
Risk-free rate	0.7
Measurement Input, Price Volatility [Member] \| Private Placement Warrants [Member]
Risk-free rate	0.55
Measurement Input, Expected Term [Member] \| Private Placement Warrants [Member]
Risk-free rate	4.81
Measurement Input, Expected Dividend Rate [Member] \| Private Placement Warrants [Member]
Risk-free rate	0
April and October Convertible Notes [Member] \| Measurement Input, Risk Free Interest Rate [Member]
Risk-free rate	0.0371
April and October Convertible Notes [Member] \| Measurement Input, Share Price [Member]
Risk-free rate	0.7
April and October Convertible Notes [Member] \| Measurement Input, Price Volatility [Member]
Risk-free rate	0.55
April and October Convertible Notes [Member] \| Measurement Input, Expected Term [Member]
Risk-free rate	0.25
April and October Convertible Notes [Member] \| Measurement Input, Expected Dividend Rate [Member]
Risk-free rate	0