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Note 10 - Earnings Per Share (Tables)
6 Months Ended
Mar. 31, 2025
Notes Tables  
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]
  

Three Months Ended March 31,

  

Six Months Ended March 31,

 
  

2025

  

2024

  

2025

  

2024

 

Net income

 $7,676,208  $6,443,390  $12,945,897  $11,463,382 

Weighted-average common shares

  10,304,222   10,170,595   10,281,725   10,099,533 

Effect of dilutive securities:

                

Options to purchase common stock

  4,146   3,411   4,214   2,751 

Diluted average common shares

  10,308,368   10,174,006   10,285,939   10,102,284 

Earnings per share of common stock:

                

Basic

 $0.74  $0.63  $1.26  $1.14 

Diluted

 $0.74  $0.63  $1.26  $1.13