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Note 12 - Net (Loss) Income Per Share (Tables)
12 Months Ended
Mar. 31, 2018
Notes Tables  
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]
   
Year E
nded March 31,
 
   
201
8
   
201
7
   
201
6
 
Net (loss) income available for shareholders
  $
(2,962
)   $
11,183
    $
11,169
 
                         
Weighted average outstanding shares of common stock
   
3,770
     
3,679
     
3,605
 
Dilutive effect of stock options
   
--
     
165
     
152
 
Common stock and equivalents
   
3,770
     
3,844
     
3,757
 
Net (loss) income per share:
                       
Basic
  $
(0.79
)   $
3.04
    $
3.10
 
Diluted
   
(0.79
)    
2.91
     
2.97