Note 8 - Shareholders' Equity - Fair Value Measurement Inputs and Valuation Techniques (Details)	Jun. 30, 2024 shares yr	Mar. 31, 2024 yr shares
Measurement Input, Risk Free Interest Rate [Member]
Derivative Liability, Measurement Input	0.0494	0.0469
Measurement Input, Share Price [Member]
Derivative Liability, Measurement Input | shares	0.0292	0.0343
Measurement Input, Expected Term [Member]
Derivative Liability, Measurement Input | yr	0.0178	0.0203
Measurement Input, Expected Dividend Rate [Member]
Derivative Liability, Measurement Input	0	0
Measurement Input, Price Volatility [Member]
Derivative Liability, Measurement Input	0.7911	0.8594