Note 13 - Geographic Information - Schedule of Geographic Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Statement [Line Items]
Net revenues	$ 7,177	$ 8,206
Long-lived assets	276	484
UNITED STATES
Statement [Line Items]
Net revenues	7,177	8,206
Long-lived assets	7	97
Non-US [Member]
Statement [Line Items]
Net revenues	0	0
Long-lived assets	$ 269	$ 387