Note 5 - Income Taxes - Reconciliation of Effective Tax Rate (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Statutory provision	$ (991)	$ 180
Foreign subsidiary	(118)	(248)
State taxes	(293)	55
Permanent differences	124	261
Adjustment to prior year taxes	(355)	86
Valuation allowance	1,636	(244)
Provision for income tax expense	$ 3	$ 90