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INVENTORIES (Tables)
 6 Months Ended
Sep. 30, 2016
INVENTORIES [Abstract]  
Components of Inventories
Components of inventories were as follows (in thousands):

  
September 30,
2016
  
March 31,
2016
 
Raw materials
 
$
16,432
  
$
15,737
 
Work-in-process
  
4,899
   
6,039
 
Finished goods
  
14,902
   
13,355
 
Inventories
 
$
36,233
  
$
35,131