Note E - Leases - Balance Sheet Information (Details) - USD ($)	Dec. 31, 2020	Mar. 31, 2020	Apr. 01, 2019
Operating lease right-of-use asset			$ 63,000
Total right-of-use assets	$ 507,594
Finance lease liability, current	102,196	$ 100,728
Total lease liabilities	412,844
Other Noncurrent Assets [Member]
Operating lease right-of-use asset	19,231
Property, Plant and Equipment, Net [Member]
Finance lease right-of-use asset	488,363
Accounts Payable and Accrued Liabilities [Member]
Operating lease liability, current	19,231
Current Portion of Financing Lease [Member]
Finance lease liability, current	102,196
Other Noncurrent Liabilities [Member]
Finance lease liability, non-current	$ 291,417