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Note 4 - Inventories, net
6 Months Ended
Sep. 30, 2014
Inventory Disclosure [Abstract]  
Inventory Disclosure [Text Block]
Note 4 – Inventories, net

Inventories consist of:

   
September 30,
2014
   
March 31,
2014
 
             
Purchased parts
 
$
3,375,294
   
$
3,085,070
 
Work-in-process
   
1,333,415
     
1,134,714
 
Finished goods
   
45,558
     
10,607
 
Less: Inventory reserve
   
(210,000
)
   
(205,000
)
   
$
4,544,267
   
$
4,025,391