Note 5 - Income Taxes (Details Textual)	12 Months Ended
	Mar. 31, 2024 USD ($) yr	Mar. 31, 2023 USD ($)
Operating Loss Carryforwards, Expiration Year (Year) | yr	2,034
Deferred Tax Assets, Operating Loss Carryforwards, Not Subject to Expiration	$ 14,800,000
Income Tax Expense (Benefit)	$ 90,000	$ 0
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent	21.00%
Income (Loss) from Continuing Operations before Income Taxes, Foreign	$ 1,181,000	772,000
Deferred Tax Assets, Valuation Allowance	4,510,000	4,754,000
Accounting Standards Update 2019-12 [Member]
Income Tax Expense (Benefit)	9,000	$ 7,000
Domestic Tax Jurisdiction [Member]
Operating Loss Carryforwards	14,800,000
Operating Loss Carryforwards	$ 14,800,000
Open Tax Year	2020
State and Local Jurisdiction [Member]
Operating Loss Carryforwards	$ 14,900,000
Operating Loss Carryforwards	$ 14,900,000