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Inventories, Net (Tables)
 9 Months Ended
Sep. 30, 2017
Inventories, Net [Abstract]  
Components of inventories
The components of inventories are as follows:

  
September 30, 2017
  
December 31, 2016
 
       
Raw material and component parts
 
$
11,729,271
  
$
8,829,236
 
Work in process
  
9,456,164
   
7,118,149
 
Finished goods
  
24,022,378
   
18,082,901
 
  
$
45,207,813
  
$
34,030,286