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Property and Equipment
12 Months Ended
Jan. 03, 2020
Property, Plant and Equipment [Abstract]  
Property and Equipment PROPERTY AND EQUIPMENT
Property and equipment consisted of the following (in thousands): 
 
Estimated Useful Lives
 
December 31,
 
 
2019
 
2018
Leasehold improvements
up to 15 years
 
$
33,904

 
$
33,941

Computer equipment and software
3 years
 
17,338

 
15,022

Furniture and fixtures
5 to 7 years
 
13,053

 
12,709

Laboratory equipment
5 years
 
8,904

 
5,668

Construction in progress
 
 
1,253

 
866

 
 
 
74,452

 
68,206

Less: accumulated depreciation
 
 
(25,560
)
 
(17,309
)
Property and equipment, net
 
 
$
48,892

 
$
50,897


Depreciation and amortization expenses were $8.3 million, $4.9 million and $1.2 million during the years ended December 31, 2019, 2018 and 2017, respectively.