Quarterly report pursuant to Section 13 or 15(d)

Note 2 - Net Income Per Share - Weighted Average Common Shares Outstanding (Details)

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Note 2 - Net Income Per Share - Weighted Average Common Shares Outstanding (Details) - USD ($)
 3 Months Ended 6 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Mar. 31, 2020
Mar. 31, 2019
Net income $ 747,897 $ 367,942 $ 1,249,055 $ 1,377,902
Weighted average common shares (in shares) 13,521,172 13,422,222 13,516,608 13,411,183
Dilutive potential common shares (in shares) 27,990 55,066 13,995
Weighted average dilutive common shares outstanding (in shares) 13,521,172 13,450,212 13,571,674 13,425,178
Basic (in dollars per share) $ 0.05 $ 0.02 $ 0.09 $ 0.10
Diluted (in dollars per share) $ 0.05 $ 0.02 $ 0.09 $ 0.10