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Property, Plant and Equipment (Tables)
 9 Months Ended
Sep. 30, 2016
Property, Plant and Equipment [Abstract]  
Schedule of property, plant and equipment
  Estimated Useful Lives 

As of

September 30, 2016

  

As of

December 31, 2015

  

Increase

(Decrease)

 
            
Laboratory and manufacturing equipment 5-10 $5,435,652  $3,766,556  $1,669,096 
Building and improvements 10-25  5,027,812   4,716,204   311,608 
Office furniture and equipment 5-10  652,100   568,188   83,912 
Construction in progress(1)    1,038,731   1,084,924   (46,193)
Land    347,115   333,486   13,629 
Property, plant and equipment, gross    12,501,410   10,469,358   2,032,052 
Accumulated depreciation    (5,263,019)  (4,750,544)  (512,475)
Property, plant and equipment, net   $7,238,391  $5,718,814  $1,519,577 

 

(1) As of September 30, 2016, construction in progress included $650,733 in payments related to the construction of our commercial-scale Nisin plant. As of December 31, 2015, construction in progress consisted principally of partial payments towards new manufacturing equipment related to expanding our production capacity for First Defense®.