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Note 4 - Stock-Based Compensation (Tables)
9 Months Ended
Sep. 30, 2012
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, 2011
  $ 4.35       103,600              
Granted
    4.80       12,000              
Cancelled
    -       -              
Exercised
    -       -              
Outstanding, September 30, 2011
  $ 4.40       115,600       5.40     $ 206,332  
Exercisable, September 30, 2011
  $ 4.40       115,600       5.40     $ 206,332  
                                 
Outstanding, January 1, 2012
  $ 4.40       115,600                  
Granted
    5.27       12,000                  
Cancelled
    -       -                  
Exercised
    2.72       (2,000 )                
Outstanding, September 30, 2012
  $ 4.51       125,600       4.93     $ 213,256  
Exercisable, September 30, 2012
  $ 4.51       125,600       4.93     $ 213,256  
Schedule of Share-based Compensation, Activity [Table Text Block]
   
September 30, 2012
   
September 30, 2011
 
Weighted average grant-date fair value of stock options granted
  $ 0.83     $ 1.19  
Total fair value of stock options vested
  $ 10,000     $ 52,057  
Total intrinsic value of stock options exercised
  $ 3,077       N/A