Note 5 - Income Taxes - Schedule of Income Tax Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Federal	$ 3	$ 78
Foreign, state and other	0	12
Federal	0	0
Foreign, state and other	0	0
Provision for income tax expense	$ 3	$ 90