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4. Inventories (Tables)
 12 Months Ended
Mar. 31, 2016
Inventory Disclosure [Abstract]  
Schedule of Inventory, Current [Table Text Block] Inventories consist of:

 
 
March 31,
 
 
 
2016
   
2015
 
Purchased parts
 
$
3,420,249
   
$
2,746,671
 
Work-in-process
   
1,446,293
     
1,514,356
 
Finished  goods
   
102,490
     
334
 
Less: Allowance for obsolete inventory
   
(290,000
)
   
(229,287
)
 
 
$
4,679,032
   
$
4,032,074