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Note 3 - Inventories
12 Months Ended
Mar. 31, 2019
Notes to Financial Statements  
Inventory Disclosure [Text Block]
Note
3.
Inventories
 
Inventories were as follows:
 
   
March 31,
2019
   
March 31,
2018
 
Raw materials
  $
6,804
    $
9,059
 
Work-in-process
   
428
     
380
 
Finished goods
   
2,524
     
3,152
 
Less: reserve
   
(2,984
)    
(3,363
)
Inventories, net
  $
6,772
    $
9,228