Note 6 - Stockholders' Equity - Stock Option Roll Forward (Details) - $ / shares	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Outstanding (in shares)	34,091,250	26,391,250
Outstanding, weighted average exercise price (in dollars per share)	$ 0.23	$ 0.3
Granted to employees, officers, directors and others* (in shares)	210,000	8,135,000
Granted to employees, officers, directors and others, weighted average exercise price (in dollars per share)	$ 0.06	$ 0.07
Expired/Cancelled/Forfeited (in shares)	(862,193)	(285,000)
Expired/Cancelled/Forfeited, weighted average exercise price (in dollars per share)	$ 1.66	$ 1.65
Exercised (in shares)	(538,175)	(150,000)
Exercised, weighted average exercise price (in dollars per share)	$ 0.07	$ 0.07
Outstanding (in shares)	32,900,882	34,091,250
Outstanding, weighted average exercise price (in dollars per share)	$ 0.2	$ 0.23
Excercisable (in shares)	32,900,882
Excercisable, weighted average exercise price (in dollars per share)	$ 0.2