Note N - Income Taxes (Details Textual) - USD ($)	3 Months Ended		6 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Income Tax Expense (Benefit), Total	$ (62,716)	$ (487,992)	$ (340,484)	$ (413,493)
Effective Income Tax Rate Reconciliation, Percent, Total			23.50%	23.50%