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Note 7 - Stockholders' Equity - Measurement Inputs to Compute Incremental Value (Details)
Mar. 31, 2026
Mar. 31, 2025
Measurement Input, Expected Term [Member] | Minimum [Member]    
Measurement input 0.5 2
Measurement Input, Expected Term [Member] | Maximum [Member]    
Measurement input 2.75 3
Measurement Input, Price Volatility [Member] | Minimum [Member]    
Measurement input 1.4452 1.4071
Measurement Input, Price Volatility [Member] | Maximum [Member]    
Measurement input 1.584 1.6165
Measurement Input, Risk Free Interest Rate [Member] | Minimum [Member]    
Measurement input 0.0351 0.0403
Measurement Input, Risk Free Interest Rate [Member] | Maximum [Member]    
Measurement input 0.0358 0.0406
Measurement Input, Expected Dividend Rate [Member]    
Measurement input 0 0