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Note 5 - Stock Option Plan (Tables)
 3 Months Ended
Mar. 31, 2015
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Schedule of Nonvested Restricted Stock Units Activity [Table Text Block]
   
Number
of
Shares
   
Weighted
Average
Grant Date
Fair Value
 
Nonvested at January 1, 2015
    -       -  
Granted
    19,500     $ 24.50  
Vested
    -       -  
Forfeited
    -       -  
                 
Nonvested at March 31, 2015
    19,500     $ 24.50