Note 5 - Income Taxes (Details Textual)	12 Months Ended
	Mar. 31, 2026 USD ($)	Mar. 31, 2025 USD ($)
Operating Loss Carryforwards, Expiration Year	2,036
Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense	$ 0
Income Tax Expense (Benefit)	$ 0	$ 3,000
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent	20.90%	20.90%
Deferred Tax Assets, Valuation Allowance	$ 7,312,000	$ 6,161,000
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued	0	0
Accounting Standards Update 2019-12 [Member]
Income Tax Expense (Benefit)	11,000	$ 8,000
Income Tax Jurisdiction, Domestic Federal [Member]
Operating Loss Carryforwards	24,400,000
Deferred Tax Assets, Operating Loss Carryforwards, Not Subject to Expiration	$ 24,400,000
Open Tax Year	2022 2023 2024 2025 2026
Income Tax Jurisdiction, Domestic State and Local [Member]
Operating Loss Carryforwards	$ 25,500,000
Income Tax Jurisdiction, Foreign [Member]
Operating Loss Carryforwards	$ 2,200,000