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Note 8 - Earnings Per Share (Tables)
3 Months Ended
Jun. 30, 2018
Notes Tables  
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]
   
Three Months Ended June 30,
 
   
2018
   
2017
 
Net income available for shareholders
  $
4,230
    $
1,517
 
Weighted average number of outstanding shares of common stock
   
3,816
     
3,736
 
Dilutive effect of stock awards
   
190
     
187
 
Diluted weighted average number of outstanding shares of common stock
   
4,006
     
3,923
 
                 
Earnings per share:
               
Basic
  $
1.11
    $
0.41
 
Diluted
  $
1.06
    $
0.39
 
Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block]
   
Three
M
onths
E
nded
June 30
,
 
   
2018
   
201
7
 
Stock awards subject to performance conditions
   
3
     
--
 
Stock awards that were antidilutive
   
27
     
117
 
Total stock awards excluded from diluted EPS
   
30
     
117