Note C - Summary of Significant Accounting Policies (Details Textual)		12 Months Ended
	Apr. 27, 2020 USD ($)	Dec. 31, 2022 USD ($) shares	Dec. 31, 2021 USD ($) shares
Allowance for Sales Returns		$ 179,000
Number of Operating Segments		2
Short-Term Investments, Total		$ 8,700,000	$ 14,800,000
Cash, Uninsured Amount		8,300,000	13,900,000
Accounts Receivable, Allowance for Credit Loss, Ending Balance		10,000	10,000
Gain (Loss) on Extinguishment of Debt, Total		0	276,180
Unrecognized Tax Benefits, Ending Balance		0	0
Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense, Total		$ 0	$ 0
Weighted Average Number of Shares Outstanding, Basic, Total (in shares) | shares		70,607,338	68,829,860
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares) | shares		7,855,160	7,291,800
Paycheck Protection Program CARES Act [Member]
Proceeds from Notes Payable, Total	$ 276,000
Minimum [Member]
Property, Plant and Equipment, Useful Life (Year)		3 years
Maximum [Member]
Property, Plant and Equipment, Useful Life (Year)		7 years