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Note 10 - Earnings Per Share (Tables)
3 Months Ended
Dec. 31, 2021
Notes Tables  
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]
  

Three Months Ended December 31,

 
  

2021

  

2020

 

Net income

 $3,584,529  $4,723,263 

Weighted average common shares

  8,383,986   8,167,793 

Effect of dilutive securities:

        

Options to purchase common stock

  9,046   14,390 

Diluted average common shares

  8,393,032   8,182,183 

Earnings per share of common stock:

        

Basic

 $0.43  $0.58 

Diluted

 $0.43  $0.58