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Note 9 - Earnings Per Share (Tables)
9 Months Ended
Dec. 31, 2018
Notes Tables  
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]
   
Three Months Ended December 31,
   
Nine Months Ended December 31,
 
   
2018
   
2017
   
2018
   
2017
 
Net income (loss) available for shareholders
  $
858
    $
(11,086
)   $
6,082
    $
(7,216
)
Weighted average outstanding shares of common stock
   
3,855
     
3,781
     
3,840
     
3,765
 
Dilutive effect of stock options
   
180
     
--
     
182
     
--
 
Dilutive effect of non-vested shares
   
10
     
--
     
15
     
--
 
Fully diluted shares
   
4,045
     
3,781
     
4,037
     
3,765
 
                                 
Basic
  $
0.22
    $
(2.93
)   $
1.58
    $
(1.92
)
Diluted
  $
0.21
    $
(2.93
)   $
1.51
    $
(1.92
)
Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block]
   
Three Months Ended December 31,
   
Nine Months Ended December 31,
 
   
2018
   
2017
   
2018
   
2017
 
Stock awards that were anti-dilutive
   
1
     
501
     
23
     
501
 
Stock awards subject to performance conditions
   
10
     
-
     
9
     
-
 
Total stock awards excluded from diluted EPS
   
11
     
501
     
32
     
501