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Note 7 - Inventories
9 Months Ended
Dec. 31, 2016
Notes to Financial Statements  
Inventory Disclosure [Text Block]
7.
Inventories
 
Inventories consisted of the following (in thousands):
 
 
 
December 31,
 
 
March 31,
 
 
 
2016
 
 
2016
 
 
 
(unaudited)
 
Raw materials
  $
18,952
    $
18,269
 
Work in process
   
42,476
     
41,549
 
Finished goods
   
25,690
     
29,786
 
Total
  $
87,118
    $
89,604