Note I - Stockholders' Equity - Warrants (Details) - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Outstanding, number of shares (in shares)	4,268,221
Outstanding , weighted average exercise price (in dollars per share)	$ 2.18
Outstanding, weighted average remaining life (Year)	6 months	1 year 6 months
Outstanding, intrinsic value	$ 1,187,546
Issued, number of shares (in shares)	0
Issued, weighted average exercise price (in dollars per share)	$ 0
Exercised, number of shares (in shares)	0
Exercised, weighted average exercise price (in dollars per share)	$ 0
Outstanding , number of shares (in shares)	4,268,221	4,268,221
Outstanding , weighted average exercise price (in dollars per share)	$ 2.18	$ 2.18