Note 8 - Stock Plans and Stock Based Compensation - Stock Option Activity (Details) - $ / shares	9 Months Ended	12 Months Ended
	Sep. 30, 2022	Dec. 31, 2021
options outstanding (in shares)	6,301,500	6,301,500
Weighted average exercise price (in dollars per share)	$ 0.06	$ 0.06
Weighted average fair value (in dollars per share)	$ 0.06	$ 0.06
weighted average remaining contractual life (Year)	3 years 2 months 23 days	3 years 11 months 23 days
options exercisable (in shares)	6,301,500	6,301,500
options exercisable, weighted average exercise price (in dollars per share)	$ 0.06	$ 0.06
options exercisable, weighted average fair value (in dollars per share)	$ 0.06	$ 0.06
options exercisable, weighted average remaining contractual life (Year)	3 years 2 months 23 days	3 years 11 months 23 days