Note 11 - Legal Proceedings (Details Textual) - USD ($) $ in Millions		12 Months Ended
	Apr. 19, 2022	Mar. 31, 2023
Statement [Line Items]
Loss Contingency, Damages Awarded, Value	$ 6.5
Loss Contingency, Damages Paid, Value		$ 4.1
Legal Fees		$ 0.8