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Property and Equipment, Net
 9 Months Ended
Sep. 30, 2018
Property Plant And Equipment [Abstract]  
Property and Equipment, Net

5.

Property and Equipment, Net

Property and equipment, net consisted of the following:

 

 

 

September 30,

2018

 

 

December 31,

2017

 

Laboratory equipment

 

$

14,367

 

 

 

13,181

 

Computer equipment

 

 

2,864

 

 

 

2,832

 

Furniture and office equipment

 

 

1,033

 

 

 

1,033

 

Leasehold improvements

 

 

27,977

 

 

 

27,963

 

Construction in progress

 

 

150

 

 

 

361

 

 

 

 

46,391

 

 

 

45,370

 

Less: Accumulated depreciation and amortization

 

$

(18,308

)

 

$

(12,439

)

 

 

$

28,083

 

 

$

32,931

 

 

 

Depreciation and amortization expense was $1,974, $ 5,869, $1,866 and $5,356 for the three and nine months ended September 30, 2018 and 2017, respectively.