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Note 8 - Earnings (Loss) Per Share (Tables)
9 Months Ended
Dec. 31, 2019
Notes Tables  
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]
   
Three Months Ended December 31,
   
Nine Months Ended December 31,
 
   
2019
   
2018
   
2019
   
2018
 
Net (loss) income available for shareholders
  $
(4,630
)   $
858
    $
3,029
    $
6,082
 
Weighted average outstanding shares of common stock
   
4,367
     
3,855
     
4,142
     
3,840
 
Dilutive effect of stock options
   
--
     
180
     
251
     
182
 
Dilutive effect of non-vested shares
   
--
     
10
     
25
     
15
 
Fully diluted shares
   
4,367
     
4,045
     
4,418
     
4,037
 
                                 
Basic   $
(1.06
)   $
0.22
    $
0.73
    $
1.58
 
Diluted   $
(1.06
)   $
0.21
    $
0.69
    $
1.51
 
Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block]
   
Three Months Ended December 31,
   
Nine Months Ended December 31,
 
   
2019
   
2018
   
2019
   
2018
 
Assumed conversion of convertible debt    
608
     
--
     
318
     
--
 
Stock awards that were anti-dilutive
   
343
     
1
     
22
     
23
 
Stock awards subject to performance conditions
   
21
     
10
     
15
     
9
 
Total stock awards excluded from diluted EPS
   
972
     
11
     
355
     
32