Note 6 - Stock Option Plan (Tables)
 6 Months Ended
Jun. 30, 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     500       24.50  
Forfeited     1,000       24.50  
                 
Nonvested at June 30, 2015     18,000     $ 24.50