Note 8 - Income Taxes (Details Textual) - USD ($)	12 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Mar. 31, 2021	Mar. 31, 2018
Effective Income Tax Rate Reconciliation, Percent	0.00%	1.80%
Income Tax Expense (Benefit), Continuing Operations, Discontinued Operations	$ 61,960	$ 134,986
Income Tax Reconciliation, Prior Year Tax Penalties	41,313
Income Tax Reconciliation, Accrued Interest on Prior Year Tax Liabilities	20,647
Effective Income Tax Rate Reconciliation, Prior Year Income Taxes, Amount			$ 178,727	$ 506,145
Taxes Payable, Current	958,455
Income Tax Reconciliation, Cumulative Accrued Penalties and Interest	273,594
Operating Loss Carryforwards	51,260,036	52,067,273
Operating Loss Carryforwards, Subject to Expiration	$ 34,481,122
Operating Loss Carryforwards, Not Subject to Expiration		$ 17,026,440