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Note 3 - Inventories (Tables)
 12 Months Ended
Mar. 31, 2017
Notes Tables  
Schedule Of Inventory [Table Text Block]
   
Current
    
Long Term
    
Total
  
Raw materials
   $
338,443
     $
56,611
     $
395,054
 
Finished Goods
    
31,353
     
-
     
31,353
 
    $
369,796
     $
56,611
     $
426,407
 
   
Current
    
Long Term
    
Total
  
Raw materials
   $
187,333
    $
51,939
    $
239,272
 
Finished Goods
    
28,775
     
718
     
29,493
 
    $
216,108
    $
52,657
    $
268,765