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Note 8 - Earnings Per Share (Tables)
6 Months Ended
Sep. 30, 2018
Notes Tables  
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]
   
Three Months Ended September 30,
   
Six Months Ended September 30,
 
   
2018
   
2017
   
2018
   
2017
 
Net income available for shareholders
  $
994
    $
2,353
    $
5,224
    $
3,870
 
Weighted average outstanding shares of common stock
   
3,850
     
3,764
     
3,833
     
3,754
 
Dilutive effect of stock options
   
188
     
171
     
183
     
180
 
Dilutive effect of non-vested shares
   
8
     
--
     
13
     
--
 
Fully diluted shares
   
4,046
     
3,935
     
4,029
     
3,934
 
                                 
Basic
  $
0.26
    $
0.63
    $
1.36
    $
1.03
 
Diluted
  $
0.25
    $
0.60
    $
1.30
    $
0.98
 
Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block]
   
Three Months Ended September 30,
   
Six Months Ended September 30,
 
   
2018
   
2017
   
2018
   
2017
 
Stock awards that were anti-dilutive
   
1
     
111
     
24
     
111
 
Stock awards subject to performance conditions
   
11
     
-
     
7
     
-
 
Total stock awards excluded from diluted EPS
   
12
     
111
     
31
     
111