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Inventories (Tables)
3 Months Ended
Jun. 30, 2015
Inventories [Abstract]  
Inventories
Inventories consist of the following:

  
June 30, 2015
  
March 31, 2015
 
     
Raw materials
 
$
3,377,000
  
$
3,156,000
 
Work-in-process
  
658,000
   
527,000
 
Finished goods
  
834,000
   
1,143,000
 
         
  
$
4,869,000
  
$
4,826,000