Note E - Leases - Balance Sheet Information (Details) - USD ($)	Jun. 30, 2021	Mar. 31, 2021
Total right-of-use assets	$ 625,442	$ 486,730
Finance lease liability, current	103,185	102,689
Total lease liabilities	492,805	373,096
Other Noncurrent Assets [Member]
Operating lease right-of-use asset	150,045	4,850
Property, Plant and Equipment, Net [Member]
Finance lease right-of-use asset	475,397	481,880
Accounts Payable and Accrued Liabilities [Member]
Operating lease liability, current	49,604	4,850
Current Portion of Financing Lease [Member]
Finance lease liability, current	103,185	102,689
Other Noncurrent Liabilities [Member]
Operating lease liability, non-current	100,441	0
Finance lease liability, non-current	$ 239,575	$ 265,557