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Stock-Based Compensation (Tables)
12 Months Ended
Sep. 30, 2017
1997 Plan [Member]  
Summary of Option Activity under Stock-Based Compensation Plan

The following table summarizes option activity under the 1997 Plan:

 

     Number of
Shares
     Exercise Price
Per Share
 

Outstanding at September 30, 2014 and 2015

     41,250      $ 6.213  

Options exercised during fiscal 2016

     (30,000    $ 6.213  

Options expired during fiscal 2016

     (11,250    $ 6.213  
  

 

 

    

Options outstanding at September 30, 2016

     —       
  

 

 

    
January 19, 2016 Class B Stock Options [Member]  
Fair Value of Stock Options at Time of Grant

The following assumptions were used to determine the fair value of the stock options at time of grant:

 

Risk-free interest rate

     2.5

Expected life of options

     10.0 years  

Dividend yield

     0.0

Volatility

     29.1
September 26, 2016 Class B Stock Options [Member]  
Fair Value of Stock Options at Time of Grant

The following assumptions were used to determine the fair value of the stock options at time of grant:

 

Risk-free interest rate

     2.25

Expected life of options

     10.0 years  

Dividend yield

     0.0

Volatility

     29.2
2009 Plan [Member]  
Summary of Option Activity under Stock-Based Compensation Plan

The following table summarizes option activity under the 2009 Plan:

 

     Number of
Shares
     Average
Exercise Price
Per Share
 

Options outstanding at September 30, 2014

     474,750      $ 5.103  

Options exercised during fiscal 2015

     (28,125    $ 4.839  
  

 

 

    

Options outstanding at September 30, 2015

     446,625      $ 5.120  

Options granted

     75,000      $ 8.760  

Options exercised during fiscal 2016

     (37,875    $ 5.126  
  

 

 

    

Options outstanding at September 30, 2016

     483,750      $ 5.684  

Options exercised during fiscal 2017

     (43,750    $ 5.126  
  

 

 

    

Options outstanding at September 30, 2017

     440,000      $ 5.739