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Property, Plant and Equipment (Tables)
 12 Months Ended
Dec. 31, 2016
Property, Plant and Equipment [Abstract]  
Schedule of property, plant and equipment
  

Estimated Useful Lives

(in years)

 

As of December 31,

  Increase 
    2016  2015  (Decrease) 
Laboratory and manufacturing equipment 5-10 $5,562,938  $3,766,556  $1,796,382 
Building and improvements 10-33  5,037,512   4,716,204   321,308 
Office furniture and equipment 5-10  653,462   568,188   85,274 
Construction in progress(1)    3,694,509   1,084,924   2,609,585 
Land    347,114   333,486   13,628 
Property, plant and equipment, gross    15,295,535   10,469,358   4,826,177 
Accumulated depreciation    (5,449,242)  (4,750,544)  (698,698)
Property, plant and equipment, net   $9,846,293  $5,718,814  $4,127,479 

 

(1)As of December 31, 2016, construction in progress consisted principally of initial costs incurred in connection with the building and equipping of our Nisin production plant for Mast Out®. 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®.