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Note 3 - Inventories
3 Months Ended
Jun. 30, 2016
Notes to Financial Statements  
Inventory Disclosure [Text Block]
Note 3 - Inventories
 
Inventories consist of the following (in thousands):
 
 
 
June 30, 2016
 
 
March 31,
2016
 
Raw materials
  $ 9,799     $ 9,433  
Work-in-process
    562       337  
Finished goods
    4,080       4,941  
Less: reserve
    (322 )     (694 )
    $ 14,119     $ 14,017