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Property and Equipment, Net
 12 Months Ended
Dec. 31, 2018
Property, Plant and Equipment [Abstract]  
Property and Equipment, Net
PROPERTY AND EQUIPMENT, NET
Property and equipment, net consisted of the following as of December 31, 2018 and 2017 (in thousands):
 
December 31,
 
2018
 
2017
Computer equipment and software
$
1,637

 
$
1,401

Furniture and fixtures
1,737

 
1,442

Leasehold improvements
2,938

 
2,938

Laboratory and production equipment
6,000

 
654

Construction in progress
420

 
5,068

 
12,732

 
11,503

Less: accumulated depreciation
(5,211
)
 
(3,599
)
Property and equipment, net
$
7,521

 
$
7,904



During 2018, 2017 and 2016, depreciation expense was $1.6 million, $1.2 million, and $0.9 million, respectively.