Note 6 - Loss per Share - Reconciliation of the Amounts Used in Calculating Basic and Diluted Net Loss per Common Share (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Loss available to common shareholders	$ (208,602)	$ (5,882)	$ (399,455)	$ (39,158)
Loss available to common shareholders, shares (in shares)	11,207,804	11,201,760	11,204,799	11,201,760
Loss available to common shareholders, per share amount (in dollars per share)	$ (0.02)		$ (0.04)
Effect of dilutive stock options, shares (in shares)
Diluted net loss per common share	$ (208,602)	$ (5,882)	$ (399,455)	$ (39,158)
Diluted net loss per common share, shares (in shares)	11,207,804	11,201,760	11,204,799	11,201,760
Diluted net loss per common share, per share amount (in dollars per share)	$ (0.02)		$ (0.04)