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Inventories, Net (Tables)
6 Months Ended
Jun. 30, 2014
Inventory Disclosure [Abstract]  
Schedule of Inventory, Current [Table Text Block]
 
 
June 30, 
2014
 
December 31,
2013
 
Raw materials
 
$
3,711,652
 
$
3,342,528
 
Work in process
 
 
1,369,159
 
 
1,149,704
 
Finished goods
 
 
12,319,254
 
 
11,673,872
 
Allowance for excess quantities
 
 
(748,830)
 
 
(737,691)
 
Total inventories
 
$
16,651,235
 
$
15,428,413