Note 1 - Basis of Presentation - Basic and Diluted Loss Per Share (Details) - USD ($)	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Basic net loss	$ (376,138)	$ (229,780)
Add back: (Gain) loss on change in fair value of derivative liabilities	2,758	(13,304)
Diluted net loss	$ (373,380)	$ (243,084)
Weighted average basic shares outstanding (in shares)	18,824,106	18,187,900
Shares issuable from convertible credit line payable (in shares)	168,328	148,328
Shares issuable from senior secured convertible notes payable (in shares)	263,992	0
Dilutive shares (in shares)	19,256,426	18,336,228
Basic (in dollars per share)	$ (0.02)	$ (0.01)
Diluted (in dollars per share)	$ (0.02)	$ (0.01)