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Property and Equipment, Net
 12 Months Ended
Dec. 31, 2017
Property Plant And Equipment [Abstract]  
Property and Equipment, Net

5.

Property and Equipment, Net

Property and equipment, net consisted of the following:

 

 

 

December 31,

2017

 

 

December 31,

2016

 

Laboratory equipment

 

$

13,181

 

 

$

10,711

 

Computer equipment

 

 

2,832

 

 

 

1,335

 

Furniture and office equipment

 

 

1,033

 

 

 

1,010

 

Leasehold improvements

 

 

27,963

 

 

 

27,807

 

Construction in progress

 

 

361

 

 

 

442

 

 

 

 

45,370

 

 

 

41,305

 

Less: Accumulated depreciation and amortization

 

 

(12,439

)

 

 

(5,180

)

 

 

$

32,931

 

 

$

36,125

 

 

Depreciation and amortization expense was $7,259, $4,205 and $728 for the years ended December 31, 2017, 2016 and 2015, respectively.