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Note 4 - Property and Equipment (Tables)
 12 Months Ended
Mar. 31, 2017
Notes Tables  
Property, Plant and Equipment [Table Text Block]
   
2017
    
2016
  
Computer equipment
   $
-
    $
13,364
 
Machinery and equipment
    
199,810
     
87,435
 
Leasehold improvements
    
3,750
     
3,750
 
     
203,560
     
104,549
 
                 
Accumulated depreciation and amortization
    
(32,562
 )    
(77,690
 )
                 
Property and equipment, net
   $
170,998
    $
26,859