Note 11 - Loss Per Share - Basic and Diluted Earnings (Loss) Per Share (Details) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Net loss	$ (444,357)	$ (1,903,341)
Denominator for basic loss per share – weighted average shares (in shares)	1,746,000	1,845,000
Dilutive effect of employee stock options and other warrants (in shares)
Denominator for diluted loss per share – adjusted weighted average shares (in shares)	1,746,000	1,845,000
Loss per common share - Basic (in dollars per share)	$ (0.25)	$ (1.03)
Loss per common share - Diluted (in dollars per share)	$ (0.25)	$ (1.03)