Note 1 - Basis of Presentation - Basic and Diluted Loss Per Share (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Basic net loss	$ (337,632)	$ (216,063)	$ (575,017)	$ (261,594)
Add back: Gain on change in fair value of derivative liabilities			(22,252)	(465,575)
Diluted net loss	$ (337,632)	$ (216,063)	$ (597,269)	$ (727,169)
Weighted average basic shares outstanding (in shares)	18,014,580	17,689,993	17,925,910	17,536,065
Shares issuable from convertible credit line payable (in shares)			148,328	142,446
Dilutive shares (in shares)	18,014,580	17,689,993	18,074,238	17,678,511
Basic (in dollars per share)	$ (0.02)	$ (0.01)	$ (0.03)	$ (0.01)
Diluted (in dollars per share)	$ (0.02)	$ (0.01)	$ (0.03)	$ (0.04)