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Property and Equipment
9 Months Ended
Sep. 27, 2019
Property, Plant and Equipment [Abstract]  
PROPERTY AND EQUIPMENT PROPERTY AND EQUIPMENT
Property and equipment consisted of the following (in thousands): 
 
September 30,
2019
 
December 31,
2018
Leasehold improvements
$
33,769

 
$
33,941

Computer equipment and software
17,017

 
15,022

Furniture and fixtures
13,053

 
12,709

Laboratory equipment
8,408

 
5,668

Construction in progress
617

 
866

 
72,864

 
68,206

Less: accumulated depreciation and amortization
(23,397
)
 
(17,309
)
Property and equipment, net
$
49,467

 
$
50,897


Depreciation expense was $2.1 million and $6.1 million for the three and nine months ended September 30, 2019, respectively, as compared to $1.7 million and $2.9 million and for the comparable periods in 2018.