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Note D - Stock-Based Compensation (Tables)
3 Months Ended
Mar. 31, 2015
Disclosure Text Block Supplement [Abstract]  
Schedule of Share-based Compensation, Activity [Table Text Block]
   

Shares Under Options

   

Weighted-Average Exercise Price

   

Weighted- Average Remaining Contractual Term

   

Aggregate Intrinsic Value*

 
           

(per share)

   

(in years)

         

Outstanding-January 1, 2015

    86,348     $ 11.09                  

Granted

    -       -                  

Exercised

    (4,000 )     14.32                  

Cancelled/forfeited/expired

    -       -                  

Outstanding at March 31, 2015

    82,348     $ 10.94       5.3     $ 3,815,593  
                                 

Exercisable at March 31, 2015

    34,239     $ 10.92       2.9     $ 1,586,926  
Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units Activity [Table Text Block]
   

Number of Options

   

Weighted- Average Grant Date Fair Value

 

Nonvested at January 1, 2015

    48,109     $ 6.10  

Granted

    -       -  

Canceled/forfeited/expired

    -       -  

Vested

    -       -  

Nonvested at March 31, 2015

    48,109     $ 6.10  
   

Number of Options

   

Weighted- Average Grant Date Fair Value

 

Nonvested at January 1, 2015

    7,600     $ 42.65  

Granted

    1,225       57.27  

Canceled/forfeited/expired

    -       -  

Vested

    (1,225 )     57.27  

Nonvested at March 31, 2015

    7,600     $ 42.65  
Schedule of Share-based Compensation, Shares Authorized under Stock Option Plans, by Exercise Price Range [Table Text Block]
 

Exercise Price

   

Shares Under Outstanding Options

   

Weighted-Average Remaining Contractual Term

   

Shares Under Exercisable Options

 
                 

(in years)

         
  $ 10.44       15,000       2.9       15,000  
  $ 10.90       6,000       2.2       6,000  
  $ 10.90       41,400       7.2       -  
  $ 11.22       11,948       5.7       5,239  
  $ 11.54       4,000       1.9       4,000  
  $ 11.75       4,000       0.9       4,000  
            82,348       5.3       34,239