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Inventories (Tables)
3 Months Ended
Mar. 31, 2015
Inventories [Abstract]  
Inventories
Inventories are comprised of the following:

  
March 31,
2015
  
December 31, 2014
 
  
(unaudited)
   
     
Raw materials
 
$
8,796,000
  
$
8,251,000
 
Work-in-process
  
1,828,000
   
1,139,000
 
Finished goods
  
7,283,000
   
6,518,000
 
  
$
17,907,000
  
$
15,908,000