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Property, Plant And Equipment, Net
 12 Months Ended
Dec. 31, 2018
Property, Plant And Equipment, Net [Abstract]  
PROPERTY, PLANT AND EQUIPMENT, net

7. PROPERTY, PLANT AND EQUIPMENT, net

 

Property, plant and equipment consisted of the following:

 

    Estimated
Useful Lives 
(in years)		   As of 
December 31,
2018		     As of 
December 31,
2017		  
Laboratory and manufacturing equipment   3-10   $ 15,092,252     $ 5,511,452  
Building and improvements   10-39     17,018,316       16,966,728  
Office furniture and equipment   3-10     731,510       698,877  
Construction in progress   n/a     91,067       8,315,436  
Land   n/a     516,867       518,999  
Property, plant and equipment, gross         33,450,012       32,011,492  
Accumulated depreciation         (7,422,463 )     (5,941,803 )
Property, plant and equipment, net       $ 26,027,549     $ 26,069,689  

 

As of December 31, 2018, construction in progress consisted principally of down payments towards two pieces of manufacturing equipment. As of December 31, 2017, construction in progress consisted principally of payments for equipment to be used in our Nisin production facility. Approximately $22,681 and $435,448 of property, plant and equipment was disposed of during the years ended December 31, 2018 and 2017, respectively. Depreciation expense was approximately $1,501,607 and $885,331 during the years ended December 31, 2018 and 2017, respectively.