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Note 4 - Inventories
6 Months Ended
Sep. 30, 2019
Notes to Financial Statements  
Inventory Disclosure [Text Block]
Note
4
.
Inventories
 
Inventories consist of the following:
 
   
September 30, 2019
   
March 31, 2019
 
Raw materials
  $
6,373
    $
6,804
 
Work-in-process
   
321
     
428
 
Finished goods
   
3,068
     
2,524
 
Less: reserve
   
(2,914
)    
(2,984
)
Inventories, net
  $
6,848
    $
6,772