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Property and Equipment
6 Months Ended
Jun. 30, 2020
Property, Plant and Equipment [Abstract]  
Property and Equipment
Property and Equipment

The gross carrying amount and accumulated depreciation of property and equipment as of June 30, 2020 and December 31, 2019 are as follows:
 
 
June 30, 2020
 
December 31, 2019
Gross carrying amount
 
$
18,734,145

 
$
18,735,885

Accumulated depreciation
 
(18,455,800
)
 
(18,366,612
)
Property and Equipment, net
 
$
278,345

 
$
369,273



For the three months ended June 30, 2020 and 2019, depreciation expense was $44,778 and $61,612, respectively. For the six months ended June 30, 2020 and 2019, depreciation expense was $90,721 and $133,826, respectively.