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Note 3 - Inventories
3 Months Ended
Jun. 30, 2018
Notes to Financial Statements  
Inventory Disclosure [Text Block]
Note
3
.
Inventories
 
Inventories consist of the following:
 
   
June 30, 2018
   
March 31,
2018
 
Raw materials
  $
8,642
    $
9,059
 
Work-in-process
   
479
     
380
 
Finished goods
   
2,940
     
3,152
 
Less: reserve
   
(3,429
)    
(3,363
)
Inventories, net
  $
8,632
    $
9,228