Note E - Leases - Balance Sheet Information (Details) - USD ($)	Sep. 30, 2021	Mar. 31, 2021
Total right-of-use assets	$ 606,881	$ 486,730
Finance lease liability, current	103,684	102,689
Total lease liabilities	455,117	373,096
Other Noncurrent Assets [Member]
Operating lease right-of-use asset	137,967	4,850
Property, Plant and Equipment, Net [Member]
Finance lease right-of-use asset	468,914	481,880
Accounts Payable and Accrued Liabilities [Member]
Operating lease liability, current	50,477	4,850
Current Portion of Financing Lease [Member]
Finance lease liability, current	103,684	102,689
Other Noncurrent Liabilities [Member]
Operating lease liability, non-current	87,490	0
Finance lease liability, non-current	$ 213,466	$ 265,557