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4. Inventories (Tables)
 12 Months Ended
Mar. 31, 2014
Inventory Disclosure [Abstract]  
Schedule of Inventory, Current [Table Text Block] Inventories consist of:

   
March 31,
 
   
2014
   
2013
 
Purchased parts
 
$
3,085,070
   
$
4,418,989
 
Work-in-process
   
1,134,714
     
1,636,325
 
Finished  goods
   
10,607
     
385,867
 
Less: Allowance for obsolete inventory
   
(205,000
)
   
(200,000
)
   
$
4,025,391
   
$
6,241,181