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Note D - Stock Based Compensation (Tables)
6 Months Ended
Jun. 30, 2013
Disclosure Text Block Supplement [Abstract]  
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]
   

Six Months Ended

June 30,

 
   

2013

   

2012

 

Dividend yield

    0 %   0%  

Volatility

    62.69 %    57.88% - 65.89%  

Risk-free rate

    0.61 %    0.64% - 1.09%  

Expected life (years)

   

4.3

    4.2 -

6.5

 

Fair value of options

  $ 5.13     $5.54 - $6.06  
Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block]
   

Shares Under Options

   

Weighted-

Average

Exercise Price

   

Weighted-

Average

Remaining Contractual

Term

   

Aggregate

Intrinsic

Value*

 
           

(per share)

   

(in years)

         

Outstanding-beginning of year

    235,379     $ 11.38                  

Granted

    35,000       10.44                  

Exercised

    -       -                  

Cancelled/forfeited/expired

    (19,376 )     13.94                  

Outstanding at June 30, 2013

    251,003     $ 11.05       6.5     $ 25,640  
                                 

Exercisable at June 30, 2013

    137,600     $ 11.10       4.9     $ 25,640  
Schedule of Share-based Compensation, Activity [Table Text Block]
 

Exercise Price

   

Shares Under

Outstanding

Options

   

Weighted-Average

Remaining Contractual

Term

   

Shares Under

Exercisable

Options

 
                 

(in years)

         
  $ 3.84       4,000       0.7       4,000  
  $ 10.44       35,000       4.7       35,000  
  $ 10.90       21,000       3.9       21,000  
  $ 10.90       104,000       8.9       20,800  
  $ 11.22       49,003       7.4       18,800  
  $ 11.54       12,000       3.7       12,000  
  $ 11.75       12,000       2.7       12,000  
  $ 14.32       14,000       1.7       14,000  
            251,003       4.9       137,600