Note J - Stock Option Plans - Summary of Option Activity for Employees (Details) - Share-Based Payment Arrangement, Option [Member] - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 30, 2022	Dec. 31, 2021
Share-Based Payment Arrangement, Employee [Member]
Number of options (in shares)	2,843,693	2,843,693
Weighted average exercise price, outstanding (in dollars per share)	$ 2.39	$ 2.39
Weighted average remaining contractual life, outstanding (Year)	6 years 4 months 17 days		7 years 8 months 8 days
Aggregate intrinsic value, outstanding	$ 49,246
Number of options granted (in shares)	216,296
Weighted average exercise price, granted (in dollars per share)	$ 1.52
Weighted average remaining contractual life, granted (Year)	2 years 2 months 23 days
Number of options exercised (in shares)	0
Weighted average exercise price, exercised (in dollars per share)	$ 0
Number of options forfeited and expired (in shares)	0
Weighted average exercise price, forfeited or expired (in dollars per share)	$ 0
Number of options (in shares)	3,059,989		2,843,693
Weighted average exercise price, outstanding (in dollars per share)	$ 2.36		$ 2.39
Number of options exercisable (in shares)	1,026,987
Weighted average exercise price, exercisable (in dollars per share)	$ 2.18
Weighted average remaining contractual life, exercisable (Year)	4 years 11 months 4 days
Share-Based Payment Arrangement, Nonemployee [Member]
Number of options (in shares)	83,330	83,330
Weighted average exercise price, outstanding (in dollars per share)	$ 1.85	$ 1.85
Weighted average remaining contractual life, outstanding (Year)	2 years 6 months 18 days		3 years 3 months 29 days
Aggregate intrinsic value, outstanding	$ 1,083		$ 49,748
Number of options granted (in shares)		8,333
Weighted average exercise price, granted (in dollars per share)	$ 0.73
Number of options exercised (in shares)		0
Weighted average exercise price, exercised (in dollars per share)	0
Number of options (in shares)		91,663	83,330
Weighted average exercise price, outstanding (in dollars per share)	1.75		$ 1.85
Number of options exercisable (in shares)		77,776
Weighted average exercise price, exercisable (in dollars per share)	$ 1.66
Weighted average remaining contractual life, exercisable (Year)	2 years 3 months 18 days
Weighted average remaining contractual life, granted (Year)	4 years 9 months 18 days
Aggregate intrinsic value, exercisable	$ 1,083