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Note 2 - Net Income Per Share (Tables)
9 Months Ended
Jun. 30, 2020
Notes Tables  
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]
   

Three Months Ended June 30,

   

Nine Months Ended June 30,

 
   

2020

   

2019

   

2020

   

2019

 

Net income

  $ 2,994,568     $ 1,300,527     $ 4,243,623     $ 2,678,429  

Weighted average common shares

    13,497,955       13,446,289       13,510,413       13,422,885  

Dilutive potential common shares

    -       5,382       36,711       11,124  

Weighted average dilutive common shares outstanding

    13,497,955       13,451,671       13,547,124       13,434,009  

Net income per common share:

                               

Basic

  $ 0.22     $ 0.10     $ 0.31     $ 0.20  

Diluted

  $ 0.22     $ 0.10     $ 0.31     $ 0.20