Note J - Stock Option Plans - Summary of Option Activity for Employees (Details) - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Number of options (in shares)	74,997
Weighted average exercise price, outstanding (in dollars per share)	$ 1.41
Weighted average remaining contractual life, outstanding (Year)		3 years 2 months 4 days
Aggregate intrinsic value, outstanding		$ 54,748
Number of options (in shares)		74,997
Weighted average exercise price, outstanding (in dollars per share)		$ 1.41
Share-based Payment Arrangement, Option [Member]
Aggregate intrinsic value, exercised	$ 290,688	$ 330,231
Share-based Payment Arrangement, Option [Member] | Share-based Payment Arrangement, Employee [Member]
Number of options (in shares)	1,953,443
Weighted average exercise price, outstanding (in dollars per share)	$ 1.88
Weighted average remaining contractual life, outstanding (Year)	7 years 8 months 8 days	3 years 1 month 2 days
Aggregate intrinsic value, outstanding	$ 49,246	$ 476,964
Number of options granted (in shares)	2,140,175
Weighted average exercise price, granted (in dollars per share)	$ 2.46
Weighted average remaining contractual life, granted (Year)	8 years 11 months 1 day
Aggregate intrinsic value, granted	$ 0
Number of options exercised (in shares)	(818,166)
Weighted average exercise price, exercised (in dollars per share)	$ 1.70
Aggregate intrinsic value, exercised	$ 0
Number of options forfeited and expired (in shares)	(431,759)
Weighted average exercise price, forfeited or expired (in dollars per share)	$ 2.02
Number of options (in shares)	2,843,693	1,953,443
Weighted average exercise price, outstanding (in dollars per share)	$ 2.39	$ 1.88
Number of options exercisable (in shares)	522,157
Weighted average exercise price, exercisable (in dollars per share)	$ 2.19
Weighted average remaining contractual life, exercisable (Year)	3 years 10 months 24 days
Aggregate intrinsic value, exercisable	$ 32,831
Share-based Payment Arrangement, Option [Member] | Share-based Payment Arrangement, Nonemployee [Member]
Weighted average remaining contractual life, outstanding (Year)	3 years 3 months 29 days
Aggregate intrinsic value, outstanding	$ 49,748
Number of options granted (in shares)	24,999
Weighted average exercise price, granted (in dollars per share)	$ 3.28
Weighted average remaining contractual life, granted (Year)	4 years 5 months 4 days
Number of options exercised (in shares)	(8,333)
Weighted average exercise price, exercised (in dollars per share)	$ 1.70
Number of options forfeited and expired (in shares)	(8,333)
Weighted average exercise price, forfeited or expired (in dollars per share)	$ 2.34
Number of options (in shares)	83,330
Weighted average exercise price, outstanding (in dollars per share)	$ 1.85
Number of options exercisable (in shares)	55,546
Weighted average exercise price, exercisable (in dollars per share)	$ 1.45
Weighted average remaining contractual life, exercisable (Year)	2 years 11 months 19 days
Aggregate intrinsic value, exercisable	$ 45,079