Note 5 - Income Taxes - Schedule of Income Tax Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Pre-tax (loss)/income	$ (4,300)	$ (4,728)
U.S. Federal	0	3
U.S. State and local	0	0
Foreign	0	0
Total Current Expense	0	3
U.S. Federal	0	0
U.S. State and local	0	0
Foreign	0	0
Total Deferred Expense	0	0
Effective Income Tax	0	3
Income Tax Jurisdiction, Domestic Federal [Member]
Pre-tax (loss)/income	(4,964)	(5,653)
Income Tax Jurisdiction, Foreign [Member]
Pre-tax (loss)/income	$ 664	$ 925