Quarterly report pursuant to Section 13 or 15(d)

Note 10 - Earnings (Loss) Per Share - Reconciliation of the Amounts Used in Calculating Basic and Diluted Net Loss Per Common Share (Details)

v3.21.2
Note 10 - Earnings (Loss) Per Share - Reconciliation of the Amounts Used in Calculating Basic and Diluted Net Loss Per Common Share (Details) - USD ($)
3 Months Ended 9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Income (loss) available to common shareholders $ (95,527) $ 214,703 $ 218,445 $ 53,745
Income (loss) available to common shareholders, shares (in shares) 12,596,126 11,211,760 11,957,878 11,211,760
Income (loss) available to common shareholders, per share amount (in dollars per share) $ (0.01) $ 0.02 $ 0.02 $ 0
Effect of dilutive stock options, shares (in shares) 0 625,667 627,036 598,632
Diluted net income (loss) per common share $ (95,527) $ 214,703 $ 218,445 $ 53,745
Diluted net income per common share (in shares) 12,596,126 11,837,427 12,584,914 11,810,392
Diluted net loss per common share, per share amount (in dollars per share) $ (0.01) $ 0.02 $ 0.02 $ 0