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Note P - Leases - Operating Lease Balance Sheet Information (Details) - USD ($)
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Operating lease cost $ 239,192 $ 186,246
Short-term lease cost 41,535
Total lease cost 239,192 227,781
Operating right-of-use assets 487,325 566,479
Operating lease liabilities, current portion 234,309 170,560
Operating lease liabilities, non-current portion 264,163 390,466
Total $ 498,472 $ 561,026
Weighted average remaining lease term (in years) – operating leases (Year) 2 years 94 days 3 years 120 days
Weighted average discount rate – operating leases 5.50% 5.50%