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Note 3 - Stock-Based Compensation (Tables)
3 Months Ended
Mar. 31, 2013
Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block]
   
Weighted Average Exercise
Price
   
#
of
shares
   
Weighted Average Remaining Contractual Term (in years)
   
Aggregate Intrinsic Value
 
Outstanding, January 1, 2012
  $ 4.40       115,600              
Granted
    5.27       12,000              
Cancelled
    -       -              
Exercised
    -       -              
Outstanding, March 31, 2012
  $ 4.48       127,600       5.38     $ 216,332  
Exercisable, March 31, 2012
  $ 4.40       115,600       4.90     $ 206,332  
                                 
Outstanding, January 1, 2013
  $ 4.53       121,600                  
Granted
    6.87       12,000                  
Cancelled
    -       -                  
Exercised
    -       -                  
Outstanding, March 31, 2013
  $ 4.74       133,600       4.97     $ 218,446  
Exercisable, March 31, 2013
  $ 4.53       121,600       4.83     $ 206,760  
Schedule of Share-based Compensation, Activity [Table Text Block]
   
March 31, 2013
   
March 31, 2012
 
Weighted average grant-date fair value of stock options granted
  $ 11,686     $ 10,000  
Total fair value of stock options vested
    N/A       N/A  
Total intrinsic value of stock options exercised
    N/A       N/A  
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]
   
2013
   
2012
 
Volatility
    19.1%       21.4%  
Expected option life (yrs)
 
3
   
3
 
Interest rate (risk free)
    0.80%       0.875%  
Dividends
 
None
   
None