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Property and Equipment
 12 Months Ended
Dec. 31, 2017
Property, Plant and Equipment [Abstract]  
Property and Equipment
Property and Equipment
Property and equipment consists of the following:
 
December 31,
 
Estimated Useful Life (years)
 
2017
 
2016
 
Furniture and equipment
$
1,187

 
$
1,121

 
7
Office equipment
513

 
513

 
3
Equipment
2,962

 
2,059

 
7
Leasehold improvements
4,596

 
1,129

 
2
 
9,258

 
4,822

 
 
Less accumulated depreciation
(2,438
)
 
(1,506
)
 
 
Property and equipment, net
$
6,820

 
$
3,316

 
 


Depreciation expense amounted to $932, $641, and $112, for the year ended December 31, 2017, 2016, and 2015, respectively.