Quarterly report pursuant to Section 13 or 15(d)

Note 2 - Net Income Per Share - Net Income Per Common Share (Details)

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Note 2 - Net Income Per Share - Net Income Per Common Share (Details) - USD ($)
3 Months Ended 9 Months Ended
Jun. 30, 2018
Jun. 30, 2017
Jun. 30, 2018
Jun. 30, 2017
Net income $ 1,755,232 $ 803,316 $ 2,393,014 $ 2,587,767
Weighted average common shares (in shares) 13,430,503 13,522,755 13,441,619 13,559,704
Dilutive potential common shares (in shares) 75,827 31,504 171,241
Weighted average dilutive common shares outstanding (in shares) 13,430,503 13,598,582 13,473,123 13,730,945
Net income per common share:        
Basic (in dollars per share) $ 0.13 $ 0.06 $ 0.18 $ 0.19
Diluted (in dollars per share) $ 0.13 $ 0.06 $ 0.18 $ 0.19