Note 5 - Income Taxes (Details Textual)	12 Months Ended
	Mar. 31, 2025 USD ($)	Mar. 31, 2024 USD ($)
Operating Loss Carryforwards, Expiration Year	2,036
Deferred Tax Assets, Operating Loss Carryforwards, Not Subject to Expiration	$ 19,100,000
Income Tax Expense (Benefit)	$ 3,000	$ 90,000
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent	21.00%
Income (Loss) from Continuing Operations before Income Taxes, Foreign	$ 925,000	1,181,000
Deferred Tax Assets, Valuation Allowance	6,145,000	4,510,000
Accounting Standards Update 2019-12 [Member]
Income Tax Expense (Benefit)	8,000	$ 9,000
Domestic Tax Jurisdiction [Member]
Operating Loss Carryforwards	$ 19,100,000
Open Tax Year	2021
State and Local Jurisdiction [Member]
Operating Loss Carryforwards	$ 21,100,000
Foreign Tax Jurisdiction [Member]
Operating Loss Carryforwards	$ 2,000,000