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Note 6 - Stock Option Plan (Tables)
 9 Months Ended
Sep. 30, 2015
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Schedule of Nonvested Restricted Stock Units Activity [Table Text Block]
    Weighted
Number
of
Shares		   Average
Grant Date
Fair Value
         
Nonvested at January 1, 2015     -       -  
Granted     19,500     $ 24.50  
Vested     500       24.50  
Forfeited     1,000       24.50  
                 
Nonvested at September 30, 2015     18,000     $ 24.50