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Property, Plant and Equipment
 12 Months Ended
Dec. 31, 2017
Property, Plant and Equipment [Abstract]  
PROPERTY, PLANT AND EQUIPMENT
7.PROPERTY, PLANT AND EQUIPMENT

 

Property, plant and equipment consisted of the following:

 

  

Estimated Useful Lives

(in years)

 

As of

December 31, 
2017

  

As of

December 31, 
2016

 
Laboratory and manufacturing equipment  3-10 $5,511,452  $5,562,938 
Building and improvements 10-39  16,966,728   5,037,512 
Office furniture and equipment 3-10  698,877   653,462 
Construction in progress    8,315,436   3,694,509 
Land    518,999   347,114 
Property, plant and equipment, gross    32,011,492   15,295,535 
Accumulated depreciation    (5,941,803)  (5,449,242)
Property, plant and equipment, net   $26,069,689  $9,846,293 

 

As of December 31, 2017, construction in progress consisted principally of payments for equipment to be used in our Nisin production facility. As of December 31, 2016, construction in progress consisted principally of costs incurred in connection with the building and equipping of our Nisin production facility. Approximately $435,448 and $140,901 of property, plant and equipment was disposed of during the years ended December 31, 2017 and 2016, respectively.