Note 8 - Income Taxes (Details Textual) - USD ($)	12 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Mar. 31, 2018
Effective Income Tax Rate Reconciliation, Percent, Total	1.80%	(3.60%)
Income Tax Expense (Benefit), Continuing Operations, Discontinued Operations	$ 134,986	$ 168,527
Income Tax Reconciliation, Prior Year Tax Penalties		207,945	$ 53,955
Income Tax Reconciliation, Accrued Interest on Prior Year Tax Liabilities			22,754
Effective Income Tax Rate Reconciliation, Prior Year Income Taxes, Amount		178,727	$ 506,145
Taxes Payable, Current, Total	896,495	592,982
Operating Loss Carryforwards	51,507,562	$ 51,063,886
Operating Loss Carryforwards, Subject to Expiration	34,481,122
Operating Loss Carryforwards, Not Subject to Expiration	$ 17,026,440