Note C - Summary of Significant Accounting Policies (Details Textual)	12 Months Ended
	Dec. 31, 2021 USD ($) shares	Dec. 31, 2020 USD ($) shares
Number of Operating Segments	2
Short-term Investments, Total	$ 13,900,000	$ 13,100,000
Accounts Receivable, Allowance for Credit Loss, Ending Balance	10,000	10,000
Gain (Loss) on Extinguishment of Debt, Total	276,180	0
Unrecognized Tax Benefits, Ending Balance	0	$ 0
Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense, Total	$ 0
Weighted Average Number of Shares Outstanding, Basic, Total (in shares) | shares	68,829,860	63,061,358
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares) | shares	7,291,800	8,397,836
Minimum [Member]
Property, Plant and Equipment, Useful Life (Year)	3 years
Maximum [Member]
Property, Plant and Equipment, Useful Life (Year)	7 years