Note 1 - Basis of Presentation - Basic and Diluted Loss Per Share (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Basic net loss	$ (394,535)	$ (267,039)	$ (770,673)	$ (496,819)
Add back: (Gain) loss on change in fair value of derivative liabilities	(14,969)	18,403	(12,211)	5,099
Diluted net loss	$ (409,504)	$ (248,636)	$ (782,884)	$ (491,720)
Weighted average basic shares outstanding (in shares)	18,824,106	18,309,939	18,824,106	18,249,450
Shares issuable from convertible credit line payable (in shares)	168,328	0	168,328	0
Shares issuable from senior secured convertible notes payable (in shares)	263,992	0	263,992	0
Dilutive shares (in shares)	19,256,426	18,309,939	19,256,426	18,249,450
Basic (in dollars per share)	$ (0.02)	$ (0.01)	$ (0.04)	$ (0.03)
Diluted (in dollars per share)	$ (0.02)	$ (0.01)	$ (0.04)	$ (0.03)