XML 56 R43.htm IDEA: XBRL DOCUMENT v3.19.1
Note 15 - Stock-based Compensation Plan (Tables)
 12 Months Ended
Dec. 31, 2018
Notes Tables  
Schedule of Nonvested Restricted Stock Units Activity [Table Text Block]
    Number
of
Shares		   Weighted
Average
Grant-Date
Fair Value
         
Nonvested at beginning of year    
10,500
     $
24.50
  
Granted    
20,000
      
37.42
  
Vested    
(4,200
 )    
26.04
  
Forfeited    
(1,400
 )    
33.73
  
                 
Nonvested at end of year    
24,900
     $
34.10