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Inventory (Tables)
6 Months Ended
Jun. 30, 2014
Inventory [Abstract]  
Schedule of Inventory, Current [Table Text Block]

  As of 
June 30,
2014
  As of 
December 31, 
2013
  (Decrease) 
Increase
 
Raw materials $257,751  $270,355  $(12,604)
Work-in-process  441,664   783,060   (341,396)
Finished goods  244,781   153,093   91,688 
Inventory $944,196  $1,206,508  $(262,312)