Note 5 - Stockholders' Equity, Options, and Warrants - Option Activity (Details) - USD ($)	6 Months Ended	12 Months Ended
	Jun. 30, 2024	Dec. 31, 2023
Outstanding (in shares)	24,787,500
Outstanding, weighted average exercise price (in dollars per share)	$ 0.05
Outstanding, weighted average remaining contractual life (Year)	5 years 6 months	5 years 4 months 24 days
Outstanding, aggregate intrinsic value	$ 0	$ 17,000
Granted (in shares)	3,075,000
Granted, weighted average exercise price (in dollars per share)	$ 0.04
Exercised (in shares)	0
Exercised, weighted average exercise price (in dollars per share)	$ 0
Expired (in shares)	0
Expired, weighted average exercise price (in dollars per share)	$ 0
Forfeited (in shares)	0
Forfeited, weighted average exercise price (in dollars per share)	$ 0
Outstanding (in shares)	27,862,500	24,787,500
Outstanding, weighted average exercise price (in dollars per share)	$ 0.04	$ 0.05
Exercisable (in shares)	20,222,500
Exercisable, weighted average exercise price (in dollars per share)	$ 0.05
Exercisable, weighted average remaining contractual life (Year)	4 years 3 months 18 days
Exercisable, aggregate intrinsic value	$ 0